CVE-2023-30456
published 2023-04-10CVE-2023-30456: An issue was discovered in arch/x86/kvm/vmx/nested.c in the Linux kernel before 6.2.8. nVMX on x86_64 lacks consistency checks for CR0 and CR4.
PriorityP421medium6.5CVSS 3.1
AVLACLPRLUINSCCNINAH
EPSS
0.47%
38.5th percentile
An issue was discovered in arch/x86/kvm/vmx/nested.c in the Linux kernel before 6.2.8. nVMX on x86_64 lacks consistency checks for CR0 and CR4.
Affected
22 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 6.1.25-1 (bookworm) | linux 6.1.25-1 (bookworm) |
| linux | linux_kernel | < 6.2.8 | 6.2.8 |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 0 < 5.10.178-1 | 5.10.178-1 |
| linux | linux_kernel | >= 0 < 6.1.25-1 | 6.1.25-1 |
| linux | linux_kernel | >= 0 < 6.1.25-1 | 6.1.25-1 |
| linux | linux_kernel | >= 0 < 6.1.25-1 | 6.1.25-1 |
| linux | linux_kernel | >= 0 < 4.15.0-212.223 | 4.15.0-212.223 |
| linux | linux_kernel | >= 0 < 5.4.0-150.167 | 5.4.0-150.167 |
| linux | linux_kernel | >= 0 < 5.15.0-73.80 | 5.15.0-73.80 |
| linux | linux_kernel | >= 0 < 3.13.0-197.248 | 3.13.0-197.248 |
| linux | linux_kernel | >= 0 < 4.4.0-241.275 | 4.4.0-241.275 |
| linux | linux_kernel | >= 0 < 4.4.0-243.277 | 4.4.0-243.277 |
| linux | linux_kernel | >= 0 < 4.15.0-214.225 | 4.15.0-214.225 |
| linux | linux_kernel | >= 0 < 5.4.0-155.172 | 5.4.0-155.172 |
| linux | linux_kernel | >= 0 < 5.15.0-78.85 | 5.15.0-78.85 |
| msrc | cbl2_kernel_5.15.107.1-2_on_cbl_mariner_2.0 | — | — |
| msrc | cbl_mariner_1.0_arm | — | — |
| msrc | cbl_mariner_1.0_x64 | — | — |
| msrc | cbl_mariner_2.0_arm | — | — |
| msrc | cbl_mariner_2.0_x64 | — | — |
| msrc | cm1_kernel_5.10.177.1-1_on_cbl_mariner_1.0 | — | — |
CVSS provenance
nvdv3.16.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
osv7.8HIGH
vendor_ubuntu7.8HIGH
vendor_debian6.5MEDIUM
vendor_msrc6.5MEDIUM
vendor_redhat6.5MEDIUM
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
Ubuntu
Linux kernel vulnerabilities
vendor_ubuntu·2024-03-18·CVSS 6.5
CVE-2024-24855 [MEDIUM] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Reima Ishii discovered that the nested KVM implementation for Intel x86
processors in the Linux kernel did not properly validate control registers
in certain situations. An attacker in a guest VM could use this to cause a
denial of service (guest crash). (CVE-2023-30456)
It was discovered that the Quick Fair Queueing scheduler implementation in
the Linux kernel did not properly handle network packets in certain
conditions, leading to a use after free vulnerability. A local attacker
could use this to cause a denial of service (system crash) or possibly
execute arbitrary code. (CVE-2023-4921)
It was discovered that a race condition existed in the SCSI Emulex
LightPulse Fibre Channel drive
Ubuntu
Linux kernel (IoT) vulnerabilities
vendor_ubuntu·2023-07-27·CVSS 5.5
CVE-2023-2162 [MEDIUM] Linux kernel (IoT) vulnerabilities
Title: Linux kernel (IoT) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Jiasheng Jiang discovered that the HSA Linux kernel driver for AMD Radeon
GPU devices did not properly validate memory allocation in certain
situations, leading to a null pointer dereference vulnerability. A local
attacker could use this to cause a denial of service (system crash).
(CVE-2022-3108)
Zheng Wang discovered that the Intel i915 graphics driver in the Linux
kernel did not properly handle certain error conditions, leading to a
double-free. A local attacker could possibly use this to cause a denial of
service (system crash). (CVE-2022-3707)
It was discovered that the infrared transceiver USB driver did not properly
handle USB control messages. A local attacker with physica
Ubuntu
Kernel Live Patch Security Notice
vendor_ubuntu·2023-07-25·CVSS 7.1
CVE-2023-31436 [HIGH] Kernel Live Patch Security Notice
Title: Kernel Live Patch Security Notice
Summary: Several security issues were fixed in the kernel.
It was discovered that the Broadcom FullMAC USB WiFi driver in the Linux
kernel did not properly perform data buffer size validation in some
situations. A physically proximate attacker could use this to craft a
malicious USB device that when inserted, could cause a denial of service
(system crash) or possibly expose sensitive information.(CVE-2023-1380)
Reima Ishii discovered that the nested KVM implementation for Intel x86
processors in the Linux kernel did not properly validate control registers
in certain situations. An attacker in a guest VM could use this to cause a
denial of service (guest crash).(CVE-2023-30456)
Mingi Cho discovered that the netfilter subsystem in the Linux kernel
Ubuntu
Linux kernel (Xilinx ZynqMP) vulnerabilities
vendor_ubuntu·2023-07-12·CVSS 5.5
CVE-2023-1380 [MEDIUM] Linux kernel (Xilinx ZynqMP) vulnerabilities
Title: Linux kernel (Xilinx ZynqMP) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Jiasheng Jiang discovered that the HSA Linux kernel driver for AMD Radeon
GPU devices did not properly validate memory allocation in certain
situations, leading to a null pointer dereference vulnerability. A local
attacker could use this to cause a denial of service (system crash).
(CVE-2022-3108)
Zheng Wang discovered that the Intel i915 graphics driver in the Linux
kernel did not properly handle certain error conditions, leading to a
double-free. A local attacker could possibly use this to cause a denial of
service (system crash). (CVE-2022-3707)
It was discovered that the infrared transceiver USB driver did not properly
handle USB control messages. A local attacker wi
Ubuntu
Linux kernel vulnerabilities
vendor_ubuntu·2023-06-22·CVSS 5.5
CVE-2023-33203 [MEDIUM] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Patryk Sondej and Piotr Krysiuk discovered that a race condition existed in
the netfilter subsystem of the Linux kernel when processing batch requests,
leading to a use-after-free vulnerability. A local attacker could use this
to cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2023-32233)
Gwangun Jung discovered that the Quick Fair Queueing scheduler
implementation in the Linux kernel contained an out-of-bounds write
vulnerability. A local attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2023-31436)
Reima Ishii discovered that the nested KVM implementation for Intel x86
processors in the Linux
Ubuntu
Linux kernel (Intel IoTG) vulnerabilities
vendor_ubuntu·2023-06-14·CVSS 7.1
CVE-2023-31436 [HIGH] Linux kernel (Intel IoTG) vulnerabilities
Title: Linux kernel (Intel IoTG) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Patryk Sondej and Piotr Krysiuk discovered that a race condition existed in
the netfilter subsystem of the Linux kernel when processing batch requests,
leading to a use-after-free vulnerability. A local attacker could use this
to cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2023-32233)
Gwangun Jung discovered that the Quick Fair Queueing scheduler
implementation in the Linux kernel contained an out-of-bounds write
vulnerability. A local attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2023-31436)
Reima Ishii discovered that the nested KVM implementation for Intel x86
processors
Ubuntu
Linux kernel vulnerabilities
vendor_ubuntu·2023-06-08·CVSS 6.6
CVE-2023-32233 [MEDIUM] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Patryk Sondej and Piotr Krysiuk discovered that a race condition existed in
the netfilter subsystem of the Linux kernel when processing batch requests,
leading to a use-after-free vulnerability. A local attacker could use this
to cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2023-32233)
Gwangun Jung discovered that the Quick Fair Queueing scheduler
implementation in the Linux kernel contained an out-of-bounds write
vulnerability. A local attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2023-31436)
Reima Ishii discovered that the nested KVM implementation for Intel x86
processors in the Linux
Ubuntu
Linux kernel vulnerabilities
vendor_ubuntu·2023-06-08·CVSS 7.1
CVE-2023-30456 [HIGH] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Patryk Sondej and Piotr Krysiuk discovered that a race condition existed in
the netfilter subsystem of the Linux kernel when processing batch requests,
leading to a use-after-free vulnerability. A local attacker could use this
to cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2023-32233)
Gwangun Jung discovered that the Quick Fair Queueing scheduler
implementation in the Linux kernel contained an out-of-bounds write
vulnerability. A local attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2023-31436)
Reima Ishii discovered that the nested KVM implementation for Intel x86
processors in the Linux
Ubuntu
Linux kernel (Azure CVM) vulnerabilities
vendor_ubuntu·2023-06-02·CVSS 7.1
CVE-2023-32233 [HIGH] Linux kernel (Azure CVM) vulnerabilities
Title: Linux kernel (Azure CVM) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Patryk Sondej and Piotr Krysiuk discovered that a race condition existed in
the netfilter subsystem of the Linux kernel when processing batch requests,
leading to a use-after-free vulnerability. A local attacker could use this
to cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2023-32233)
Gwangun Jung discovered that the Quick Fair Queueing scheduler
implementation in the Linux kernel contained an out-of-bounds write
vulnerability. A local attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2023-31436)
Reima Ishii discovered that the nested KVM implementation for Intel x86
processors i
Ubuntu
Linux kernel vulnerabilities
vendor_ubuntu·2023-06-01·CVSS 5.5
CVE-2023-0459 [MEDIUM] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Patryk Sondej and Piotr Krysiuk discovered that a race condition existed in
the netfilter subsystem of the Linux kernel when processing batch requests,
leading to a use-after-free vulnerability. A local attacker could use this
to cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2023-32233)
Gwangun Jung discovered that the Quick Fair Queueing scheduler
implementation in the Linux kernel contained an out-of-bounds write
vulnerability. A local attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2023-31436)
Reima Ishii discovered that the nested KVM implementation for Intel x86
processors in the Linux
Ubuntu
Linux kernel vulnerabilities
vendor_ubuntu·2023-06-01·CVSS 7.1
CVE-2023-30456 [HIGH] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Patryk Sondej and Piotr Krysiuk discovered that a race condition existed in
the netfilter subsystem of the Linux kernel when processing batch requests,
leading to a use-after-free vulnerability. A local attacker could use this
to cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2023-32233)
Gwangun Jung discovered that the Quick Fair Queueing scheduler
implementation in the Linux kernel contained an out-of-bounds write
vulnerability. A local attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2023-31436)
Reima Ishii discovered that the nested KVM implementation for Intel x86
processors in the Linux
Ubuntu
Linux kernel vulnerabilities
vendor_ubuntu·2023-05-31·CVSS 7.1
CVE-2023-32233 [HIGH] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Patryk Sondej and Piotr Krysiuk discovered that a race condition existed in
the netfilter subsystem of the Linux kernel when processing batch requests,
leading to a use-after-free vulnerability. A local attacker could use this
to cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2023-32233)
Gwangun Jung discovered that the Quick Fair Queueing scheduler
implementation in the Linux kernel contained an out-of-bounds write
vulnerability. A local attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2023-31436)
Reima Ishii discovered that the nested KVM implementation for Intel x86
processors in the Linux
Ubuntu
Linux kernel (OEM) vulnerabilities
vendor_ubuntu·2023-05-30·CVSS 5.5
CVE-2023-30456 [MEDIUM] Linux kernel (OEM) vulnerabilities
Title: Linux kernel (OEM) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Patryk Sondej and Piotr Krysiuk discovered that a race condition existed in
the netfilter subsystem of the Linux kernel when processing batch requests,
leading to a use-after-free vulnerability. A local attacker could use this
to cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2023-32233)
Reima Ishii discovered that the nested KVM implementation for Intel x86
processors in the Linux kernel did not properly validate control registers
in certain situations. An attacker in a guest VM could use this to cause a
denial of service (guest crash). (CVE-2023-30456)
Gwnaun Jung discovered that the SFB packet scheduling implementation in the
Linux kernel cont
Ubuntu
Linux kernel (OEM) vulnerabilities
vendor_ubuntu·2023-05-30·CVSS 7.8
CVE-2023-30456 [HIGH] Linux kernel (OEM) vulnerabilities
Title: Linux kernel (OEM) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Patryk Sondej and Piotr Krysiuk discovered that a race condition existed in
the netfilter subsystem of the Linux kernel when processing batch requests,
leading to a use-after-free vulnerability. A local attacker could use this
to cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2023-32233)
Reima Ishii discovered that the nested KVM implementation for Intel x86
processors in the Linux kernel did not properly validate control registers
in certain situations. An attacker in a guest VM could use this to cause a
denial of service (guest crash). (CVE-2023-30456)
It was discovered that the Xircom PCMCIA network device driver in the Linux
kernel did not pr
Ubuntu
Linux kernel (OEM) vulnerabilities
vendor_ubuntu·2023-04-19·CVSS 5.5
CVE-2023-1076 [MEDIUM] Linux kernel (OEM) vulnerabilities
Title: Linux kernel (OEM) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
It was discovered that the Traffic-Control Index (TCINDEX) implementation
in the Linux kernel did not properly perform filter deactivation in some
situations. A local attacker could possibly use this to gain elevated
privileges. Please note that with the fix for this CVE, kernel support for
the TCINDEX classifier has been removed. (CVE-2023-1829)
William Zhao discovered that the Traffic Control (TC) subsystem in the
Linux kernel did not properly handle network packet retransmission in
certain situations. A local attacker could use this to cause a denial of
service (kernel deadlock). (CVE-2022-4269)
Thadeu Cascardo discovered that the io_uring subsystem contained a double-
free vul
Microsoft
An issue was discovered in arch/x86/kvm/vmx/nested.c in the Linux kernel before 6.2.8. nVMX on x86_64 lacks consistency checks for CR0 and CR4.
vendor_msrc·2023-04-11·CVSS 6.5
CVE-2023-30456 [MEDIUM] An issue was discovered in arch/x86/kvm/vmx/nested.c in the Linux kernel before 6.2.8. nVMX on x86_64 lacks consistency checks for CR0 and CR4.
An issue was discovered in arch/x86/kvm/vmx/nested.c in the Linux kernel before 6.2.8. nVMX on x86_64 lacks consistency checks for CR0 and CR4.
FAQ: Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability?
One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the most recent and most secure versions of the open source libraries with which the distro is composed. Microsoft is committed to transparency in this work which is why we began publishing CSAF/VEX in October 2025. See this blog post for more information. If impact to additional products is identified, we will update the CVE to reflect this.
Mariner: Mariner
mitre: mitre
Cu
Red Hat
kernel: KVM: nVMX: missing consistency checks for CR0 and CR4
vendor_redhat·2023-04-10·CVSS 6.5
CVE-2023-30456 [MEDIUM] CWE-358 kernel: KVM: nVMX: missing consistency checks for CR0 and CR4
kernel: KVM: nVMX: missing consistency checks for CR0 and CR4
An issue was discovered in arch/x86/kvm/vmx/nested.c in the Linux kernel before 6.2.8. nVMX on x86_64 lacks consistency checks for CR0 and CR4.
A flaw was found in the KVM's Intel nested virtualization feature (nVMX). The effective values of the guest CR0 and CR4 registers could differ from those included in the VMCS12. In rare circumstances (i.e., kvm_intel module loaded with parameters nested=1 and ept=0) this could allow a malicious guest to crash the host system, causing a denial of service.
Statement: Red Hat currently provides the nested virtualization feature as a Technology Preview. Nested virtualization is therefore unsupported for production use. For more information please refer to https://access.redhat.com/solutio
Debian
CVE-2023-30456: linux - An issue was discovered in arch/x86/kvm/vmx/nested.c in the Linux kernel before ...
vendor_debian·2023·CVSS 6.5
CVE-2023-30456 [MEDIUM] CVE-2023-30456: linux - An issue was discovered in arch/x86/kvm/vmx/nested.c in the Linux kernel before ...
An issue was discovered in arch/x86/kvm/vmx/nested.c in the Linux kernel before 6.2.8. nVMX on x86_64 lacks consistency checks for CR0 and CR4.
Scope: local
bookworm: resolved (fixed in 6.1.25-1)
bullseye: resolved (fixed in 5.10.178-1)
forky: resolved (fixed in 6.1.25-1)
sid: resolved (fixed in 6.1.25-1)
trixie: resolved (fixed in 6.1.25-1)
OSV
linux vulnerabilities
osv·2024-03-18·CVSS 6.5
CVE-2023-30456 [MEDIUM] linux vulnerabilities
linux vulnerabilities
Reima Ishii discovered that the nested KVM implementation for Intel x86
processors in the Linux kernel did not properly validate control registers
in certain situations. An attacker in a guest VM could use this to cause a
denial of service (guest crash). (CVE-2023-30456)
It was discovered that the Quick Fair Queueing scheduler implementation in
the Linux kernel did not properly handle network packets in certain
conditions, leading to a use after free vulnerability. A local attacker
could use this to cause a denial of service (system crash) or possibly
execute arbitrary code. (CVE-2023-4921)
It was discovered that a race condition existed in the SCSI Emulex
LightPulse Fibre Channel driver in the Linux kernel when unregistering FCF
and re-scanning an HBA FCF table, l
OSV
linux-iot vulnerabilities
osv·2023-07-27·CVSS 5.5
CVE-2022-3108 [MEDIUM] linux-iot vulnerabilities
linux-iot vulnerabilities
Jiasheng Jiang discovered that the HSA Linux kernel driver for AMD Radeon
GPU devices did not properly validate memory allocation in certain
situations, leading to a null pointer dereference vulnerability. A local
attacker could use this to cause a denial of service (system crash).
(CVE-2022-3108)
Zheng Wang discovered that the Intel i915 graphics driver in the Linux
kernel did not properly handle certain error conditions, leading to a
double-free. A local attacker could possibly use this to cause a denial of
service (system crash). (CVE-2022-3707)
It was discovered that the infrared transceiver USB driver did not properly
handle USB control messages. A local attacker with physical access could
plug in a specially crafted USB device to cause a denial of service
OSV
Kernel Live Patch Security Notice
osv·2023-07-25·CVSS 7.1
CVE-2023-1380 [HIGH] Kernel Live Patch Security Notice
Kernel Live Patch Security Notice
It was discovered that the Broadcom FullMAC USB WiFi driver in the Linux
kernel did not properly perform data buffer size validation in some
situations. A physically proximate attacker could use this to craft a
malicious USB device that when inserted, could cause a denial of service
(system crash) or possibly expose sensitive information.(CVE-2023-1380)
Reima Ishii discovered that the nested KVM implementation for Intel x86
processors in the Linux kernel did not properly validate control registers
in certain situations. An attacker in a guest VM could use this to cause a
denial of service (guest crash).(CVE-2023-30456)
Mingi Cho discovered that the netfilter subsystem in the Linux kernel did
not properly validate the status of a nft chain while performi
OSV
linux-xilinx-zynqmp vulnerabilities
osv·2023-07-12·CVSS 5.5
CVE-2022-3108 [MEDIUM] linux-xilinx-zynqmp vulnerabilities
linux-xilinx-zynqmp vulnerabilities
Jiasheng Jiang discovered that the HSA Linux kernel driver for AMD Radeon
GPU devices did not properly validate memory allocation in certain
situations, leading to a null pointer dereference vulnerability. A local
attacker could use this to cause a denial of service (system crash).
(CVE-2022-3108)
Zheng Wang discovered that the Intel i915 graphics driver in the Linux
kernel did not properly handle certain error conditions, leading to a
double-free. A local attacker could possibly use this to cause a denial of
service (system crash). (CVE-2022-3707)
It was discovered that the infrared transceiver USB driver did not properly
handle USB control messages. A local attacker with physical access could
plug in a specially crafted USB device to cause a denial
OSV
linux-intel-iotg-5.15 vulnerabilities
osv·2023-06-14·CVSS 7.1
CVE-2023-32233 [HIGH] linux-intel-iotg-5.15 vulnerabilities
linux-intel-iotg-5.15 vulnerabilities
Patryk Sondej and Piotr Krysiuk discovered that a race condition existed in
the netfilter subsystem of the Linux kernel when processing batch requests,
leading to a use-after-free vulnerability. A local attacker could use this
to cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2023-32233)
Gwangun Jung discovered that the Quick Fair Queueing scheduler
implementation in the Linux kernel contained an out-of-bounds write
vulnerability. A local attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2023-31436)
Reima Ishii discovered that the nested KVM implementation for Intel x86
processors in the Linux kernel did not properly validate control registers
in certain si
OSV
linux, linux-aws, linux-kvm, linux-lts-xenial vulnerabilities
osv·2023-06-08·CVSS 6.6
CVE-2023-32233 [MEDIUM] linux, linux-aws, linux-kvm, linux-lts-xenial vulnerabilities
linux, linux-aws, linux-kvm, linux-lts-xenial vulnerabilities
Patryk Sondej and Piotr Krysiuk discovered that a race condition existed in
the netfilter subsystem of the Linux kernel when processing batch requests,
leading to a use-after-free vulnerability. A local attacker could use this
to cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2023-32233)
Gwangun Jung discovered that the Quick Fair Queueing scheduler
implementation in the Linux kernel contained an out-of-bounds write
vulnerability. A local attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2023-31436)
Reima Ishii discovered that the nested KVM implementation for Intel x86
processors in the Linux kernel did not properly validate control
OSV
linux-intel-iotg, linux-raspi vulnerabilities
osv·2023-06-08·CVSS 7.1
CVE-2023-32233 [HIGH] linux-intel-iotg, linux-raspi vulnerabilities
linux-intel-iotg, linux-raspi vulnerabilities
Patryk Sondej and Piotr Krysiuk discovered that a race condition existed in
the netfilter subsystem of the Linux kernel when processing batch requests,
leading to a use-after-free vulnerability. A local attacker could use this
to cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2023-32233)
Gwangun Jung discovered that the Quick Fair Queueing scheduler
implementation in the Linux kernel contained an out-of-bounds write
vulnerability. A local attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2023-31436)
Reima Ishii discovered that the nested KVM implementation for Intel x86
processors in the Linux kernel did not properly validate control registers
in ce
OSV
linux-azure-fde, linux-azure-fde-5.15 vulnerabilities
osv·2023-06-02·CVSS 7.1
CVE-2023-32233 [HIGH] linux-azure-fde, linux-azure-fde-5.15 vulnerabilities
linux-azure-fde, linux-azure-fde-5.15 vulnerabilities
Patryk Sondej and Piotr Krysiuk discovered that a race condition existed in
the netfilter subsystem of the Linux kernel when processing batch requests,
leading to a use-after-free vulnerability. A local attacker could use this
to cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2023-32233)
Gwangun Jung discovered that the Quick Fair Queueing scheduler
implementation in the Linux kernel contained an out-of-bounds write
vulnerability. A local attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2023-31436)
Reima Ishii discovered that the nested KVM implementation for Intel x86
processors in the Linux kernel did not properly validate control registe
OSV
linux, linux-aws, linux-azure, linux-azure-5.4, linux-gcp, linux-gcp-5.4, linux-gke, linux-gkeop, linux-hwe-5.4, linux-ibm, linux-ibm-5.4, linux-kvm, linux-oracle, linux-oracle-5.4 vulnerabilities
osv·2023-06-01·CVSS 7.1
[HIGH] linux, linux-aws, linux-azure, linux-azure-5.4, linux-gcp, linux-gcp-5.4, linux-gke, linux-gkeop, linux-hwe-5.4, linux-ibm, linux-ibm-5.4, linux-kvm, linux-oracle, linux-oracle-5.4 vulnerabilities
linux, linux-aws, linux-azure, linux-azure-5.4, linux-gcp, linux-gcp-5.4, linux-gke, linux-gkeop, linux-hwe-5.4, linux-ibm, linux-ibm-5.4, linux-kvm, linux-oracle, linux-oracle-5.4 vulnerabilities
Patryk Sondej and Piotr Krysiuk discovered that a race condition existed in
the netfilter subsystem of the Linux kernel when processing batch requests,
leading to a use-after-free vulnerability. A local attacker could use this
to cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2023-32233)
Gwangun Jung discovered that the Quick Fair Queueing scheduler
implementation in the Linux kernel contained an out-of-bounds write
vulnerability. A local attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2023-31436)
R
OSV
linux, linux-aws, linux-aws-hwe, linux-azure, linux-azure-4.15, linux-gcp, linux-gcp-4.15, linux-hwe, linux-kvm, linux-oracle, linux-snapdragon vulnerabilities
osv·2023-06-01·CVSS 7.1
CVE-2023-32233 [HIGH] linux, linux-aws, linux-aws-hwe, linux-azure, linux-azure-4.15, linux-gcp, linux-gcp-4.15, linux-hwe, linux-kvm, linux-oracle, linux-snapdragon vulnerabilities
linux, linux-aws, linux-aws-hwe, linux-azure, linux-azure-4.15, linux-gcp, linux-gcp-4.15, linux-hwe, linux-kvm, linux-oracle, linux-snapdragon vulnerabilities
Patryk Sondej and Piotr Krysiuk discovered that a race condition existed in
the netfilter subsystem of the Linux kernel when processing batch requests,
leading to a use-after-free vulnerability. A local attacker could use this
to cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2023-32233)
Gwangun Jung discovered that the Quick Fair Queueing scheduler
implementation in the Linux kernel contained an out-of-bounds write
vulnerability. A local attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2023-31436)
Reima Ishii discovered that the nested
OSV
linux-aws-5.4, linux-bluefield vulnerabilities
osv·2023-06-01·CVSS 5.5
CVE-2023-32233 [MEDIUM] linux-aws-5.4, linux-bluefield vulnerabilities
linux-aws-5.4, linux-bluefield vulnerabilities
Patryk Sondej and Piotr Krysiuk discovered that a race condition existed in
the netfilter subsystem of the Linux kernel when processing batch requests,
leading to a use-after-free vulnerability. A local attacker could use this
to cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2023-32233)
Gwangun Jung discovered that the Quick Fair Queueing scheduler
implementation in the Linux kernel contained an out-of-bounds write
vulnerability. A local attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2023-31436)
Reima Ishii discovered that the nested KVM implementation for Intel x86
processors in the Linux kernel did not properly validate control registers
in c
OSV
linux, linux-aws, linux-aws-5.15, linux-azure, linux-azure-5.15, linux-gcp, linux-gcp-5.15, linux-gke, linux-gke-5.15, linux-gkeop, linux-hwe-5.15, linux-hwe-5.19, linux-ibm, linux-kvm, linux-lowlaten
osv·2023-05-31·CVSS 7.1
[HIGH] linux, linux-aws, linux-aws-5.15, linux-azure, linux-azure-5.15, linux-gcp, linux-gcp-5.15, linux-gke, linux-gke-5.15, linux-gkeop, linux-hwe-5.15, linux-hwe-5.19, linux-ibm, linux-kvm, linux-lowlaten
linux, linux-aws, linux-aws-5.15, linux-azure, linux-azure-5.15, linux-gcp, linux-gcp-5.15, linux-gke, linux-gke-5.15, linux-gkeop, linux-hwe-5.15, linux-hwe-5.19, linux-ibm, linux-kvm, linux-lowlatency, linux-lowlatency-hwe-5.15, linux-oracle, linux-oracle-5.15, linux-raspi vulnerabilities
Patryk Sondej and Piotr Krysiuk discovered that a race condition existed in
the netfilter subsystem of the Linux kernel when processing batch requests,
leading to a use-after-free vulnerability. A local attacker could use this
to cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2023-32233)
Gwangun Jung discovered that the Quick Fair Queueing scheduler
implementation in the Linux kernel contained an out-of-bounds write
vulnerability. A local attacker could use this to c
OSV
linux-oem-6.0 vulnerabilities
osv·2023-05-30·CVSS 7.8
CVE-2023-32233 [HIGH] linux-oem-6.0 vulnerabilities
linux-oem-6.0 vulnerabilities
Patryk Sondej and Piotr Krysiuk discovered that a race condition existed in
the netfilter subsystem of the Linux kernel when processing batch requests,
leading to a use-after-free vulnerability. A local attacker could use this
to cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2023-32233)
Reima Ishii discovered that the nested KVM implementation for Intel x86
processors in the Linux kernel did not properly validate control registers
in certain situations. An attacker in a guest VM could use this to cause a
denial of service (guest crash). (CVE-2023-30456)
It was discovered that the Xircom PCMCIA network device driver in the Linux
kernel did not properly handle device removal events. A physically
proximate attacker could use
OSV
linux-oem-5.17 vulnerabilities
osv·2023-05-30·CVSS 5.5
CVE-2023-32233 [MEDIUM] linux-oem-5.17 vulnerabilities
linux-oem-5.17 vulnerabilities
Patryk Sondej and Piotr Krysiuk discovered that a race condition existed in
the netfilter subsystem of the Linux kernel when processing batch requests,
leading to a use-after-free vulnerability. A local attacker could use this
to cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2023-32233)
Reima Ishii discovered that the nested KVM implementation for Intel x86
processors in the Linux kernel did not properly validate control registers
in certain situations. An attacker in a guest VM could use this to cause a
denial of service (guest crash). (CVE-2023-30456)
Gwnaun Jung discovered that the SFB packet scheduling implementation in the
Linux kernel contained a use-after-free vulnerability. A local attacker
could use this to caus
OSV
linux-oem-6.1 vulnerabilities
osv·2023-04-19·CVSS 5.5
CVE-2023-1829 [MEDIUM] linux-oem-6.1 vulnerabilities
linux-oem-6.1 vulnerabilities
It was discovered that the Traffic-Control Index (TCINDEX) implementation
in the Linux kernel did not properly perform filter deactivation in some
situations. A local attacker could possibly use this to gain elevated
privileges. Please note that with the fix for this CVE, kernel support for
the TCINDEX classifier has been removed. (CVE-2023-1829)
William Zhao discovered that the Traffic Control (TC) subsystem in the
Linux kernel did not properly handle network packet retransmission in
certain situations. A local attacker could use this to cause a denial of
service (kernel deadlock). (CVE-2022-4269)
Thadeu Cascardo discovered that the io_uring subsystem contained a double-
free vulnerability in certain memory allocation error conditions. A local
attacker cou
OSV
CVE-2023-30456: An issue was discovered in arch/x86/kvm/vmx/nested
osv·2023-04-10·CVSS 6.5
CVE-2023-30456 [MEDIUM] CVE-2023-30456: An issue was discovered in arch/x86/kvm/vmx/nested
An issue was discovered in arch/x86/kvm/vmx/nested.c in the Linux kernel before 6.2.8. nVMX on x86_64 lacks consistency checks for CR0 and CR4.
GHSA
GHSA-88gp-69jr-39m4: An issue was discovered in arch/x86/kvm/vmx/nested
ghsa_unreviewed·2023-04-10
CVE-2023-30456 [HIGH] CWE-754 GHSA-88gp-69jr-39m4: An issue was discovered in arch/x86/kvm/vmx/nested
An issue was discovered in arch/x86/kvm/vmx/nested.c in the Linux kernel before 6.2.8. nVMX on x86_64 lacks consistency checks for CR0 and CR4.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2023-30456 kernel: KVM: nVMX: missing consistency checks for CR0 and CR4
bugzilla·2023-04-20·CVSS 6.5
CVE-2023-30456 [MEDIUM] CVE-2023-30456 kernel: KVM: nVMX: missing consistency checks for CR0 and CR4
CVE-2023-30456 kernel: KVM: nVMX: missing consistency checks for CR0 and CR4
An issue was discovered in arch/x86/kvm/vmx/nested.c in the Linux kernel before 6.2.8. nVMX on x86_64 lacks consistency checks for CR0 and CR4.
https://github.com/torvalds/linux/commit/112e66017bff7f2837030f34c2bc19501e9212d5
https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.2.8
Discussion:
This issue has been addressed in the following products:
Red Hat Enterprise Linux 9
Via RHSA-2023:6583 https://access.redhat.com/errata/RHSA-2023:6583
---
This issue has been addressed in the following products:
Red Hat Enterprise Linux 8
Via RHSA-2023:6901 https://access.redhat.com/errata/RHSA-2023:6901
---
This issue has been addressed in the following products:
Red Hat Enterprise Linux 8
Via RHSA-2023:70
arXiv
NecoFuzz: Effective Fuzzing of Nested Virtualization via Fuzz-Harness Virtual Machines
arxiv_fulltext·2025-12-09
NecoFuzz: Effective Fuzzing of Nested Virtualization via Fuzz-Harness Virtual Machines
## Abstract
Nested virtualization is now widely supported by major cloud vendors, allowing users to leverage virtualization-based technologies in the cloud.
However, supporting nested virtualization significantly increases host hypervisor complexity and introduces a new attack surface in cloud platforms.
While many prior studies have explored hypervisor fuzzing, none has explicitly addressed nested virtualization due to the challenge of generating effective virtual machine (VM) instances with a vast state space as fuzzing inputs.
We present , the first fuzzing framework that systematically targets nested virtualization-specific logic in hypervisors.
synthesizes executable fuzz-harness VMs with internal states near the boundary between valid and invalid, guided by an approximate model of
http://packetstormsecurity.com/files/173757/Kernel-Live-Patch-Security-Notice-LSN-0096-1.htmlhttps://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.2.8https://github.com/torvalds/linux/commit/112e66017bff7f2837030f34c2bc19501e9212d5https://lists.debian.org/debian-lts-announce/2023/05/msg00005.htmlhttps://lists.debian.org/debian-lts-announce/2023/05/msg00006.htmlhttps://security.netapp.com/advisory/ntap-20230511-0007/http://packetstormsecurity.com/files/173757/Kernel-Live-Patch-Security-Notice-LSN-0096-1.htmlhttps://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.2.8https://github.com/torvalds/linux/commit/112e66017bff7f2837030f34c2bc19501e9212d5https://lists.debian.org/debian-lts-announce/2023/05/msg00005.htmlhttps://lists.debian.org/debian-lts-announce/2023/05/msg00006.htmlhttps://security.netapp.com/advisory/ntap-20230511-0007/
2023-04-10
Published