CVE-2019-7221
published 2019-03-21CVE-2019-7221: The KVM implementation in the Linux kernel through 4.20.5 has a Use-after-Free.
PriorityP340high7.8CVSS 3.0
AVLACLPRLUINSUCHIHAH
EPSS
0.80%
56.3th percentile
The KVM implementation in the Linux kernel through 4.20.5 has a Use-after-Free.
Affected
24 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| canonical | ubuntu_linux | — | — |
| canonical | ubuntu_linux | — | — |
| canonical | ubuntu_linux | — | — |
| canonical | ubuntu_linux | — | — |
| debian | debian_linux | — | — |
| debian | linux | < linux 4.19.20-1 (bookworm) | linux 4.19.20-1 (bookworm) |
| fedoraproject | fedora | — | — |
| fedoraproject | fedora | — | — |
| linux | linux_kernel | <= 4.20.5 | — |
| linux | linux_kernel | >= 0 < 4.19.20-1 | 4.19.20-1 |
| linux | linux_kernel | >= 0 < 4.19.20-1 | 4.19.20-1 |
| linux | linux_kernel | >= 0 < 4.19.20-1 | 4.19.20-1 |
| linux | linux_kernel | >= 0 < 4.19.20-1 | 4.19.20-1 |
| linux | linux_kernel | >= 0 < 4.4.0-145.171 | 4.4.0-145.171 |
| linux | linux_kernel | >= 0 < 4.15.0-47.50 | 4.15.0-47.50 |
| opensuse | leap | — | — |
| redhat | enterprise_linux | — | — |
| redhat | enterprise_linux_desktop | — | — |
| redhat | enterprise_linux_server | — | — |
| redhat | enterprise_linux_server_aus | — | — |
| redhat | enterprise_linux_server_eus | — | — |
| redhat | enterprise_linux_server_tus | — | — |
| redhat | enterprise_linux_workstation | — | — |
| redhat | openshift_container_platform | — | — |
CVSS provenance
nvdv3.07.8HIGHCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
nvdv2.04.6MEDIUMAV:L/AC:L/Au:N/C:P/I:P/A:P
osv7.8HIGH
vendor_debian7.8HIGH
vendor_redhat7.8HIGH
vendor_ubuntu7.8HIGH
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GHSA
GHSA-jc59-87wq-g5xp: The KVM implementation in the Linux kernel through 4
ghsa_unreviewed·2022-05-13
CVE-2019-7221 [HIGH] CWE-416 GHSA-jc59-87wq-g5xp: The KVM implementation in the Linux kernel through 4
The KVM implementation in the Linux kernel through 4.20.5 has a Use-after-Free.
OSV
linux, linux-aws, linux-gcp, linux-kvm, linux-oem, linux-oracle, linux-raspi2 vulnerabilities
osv·2019-04-02·CVSS 7.8
CVE-2018-14678 [HIGH] linux, linux-aws, linux-gcp, linux-kvm, linux-oem, linux-oracle, linux-raspi2 vulnerabilities
linux, linux-aws, linux-gcp, linux-kvm, linux-oem, linux-oracle, linux-raspi2 vulnerabilities
M. Vefa Bicakci and Andy Lutomirski discovered that the kernel did not
properly set up all arguments to an error handler callback used when
running as a paravirtualized guest. An unprivileged attacker in a
paravirtualized guest VM could use this to cause a denial of service (guest
VM crash). (CVE-2018-14678)
It was discovered that the KVM implementation in the Linux kernel on ARM
64bit processors did not properly handle some ioctls. An attacker with the
privilege to create KVM-based virtual machines could use this to cause a
denial of service (host system crash) or execute arbitrary code in the
host. (CVE-2018-18021)
Mathias Payer and Hui Peng discovered a use-after-free vulnerability in the
Ad
OSV
linux-lts-xenial, linux-aws vulnerabilities
osv·2019-04-02·CVSS 7.0
CVE-2017-18249 [HIGH] linux-lts-xenial, linux-aws vulnerabilities
linux-lts-xenial, linux-aws vulnerabilities
USN-3932-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.04
LTS. This update provides the corresponding updates for the Linux
Hardware Enablement (HWE) kernel from Ubuntu 16.04 LTS for Ubuntu
14.04 LTS.
It was discovered that a race condition existed in the f2fs file system
implementation in the Linux kernel. A local attacker could use this to
cause a denial of service. (CVE-2017-18249)
Wen Xu discovered that the f2fs file system implementation in the Linux
kernel did not properly validate metadata. An attacker could use this to
construct a malicious f2fs image that, when mounted, could cause a denial
of service (system crash). (CVE-2018-13097, CVE-2018-13099, CVE-2018-13100,
CVE-2018-14614, CVE-2018-14616)
Wen Xu and Po-Ning Tseng
OSV
linux-hwe, linux-azure vulnerabilities
osv·2019-04-02·CVSS 7.8
CVE-2018-19824 [HIGH] linux-hwe, linux-azure vulnerabilities
linux-hwe, linux-azure vulnerabilities
USN-3930-1 fixed vulnerabilities in the Linux kernel for Ubuntu 18.10.
This update provides the corresponding updates for the Linux Hardware
Enablement (HWE) kernel from Ubuntu 18.10 for Ubuntu 18.04 LTS.
Mathias Payer and Hui Peng discovered a use-after-free vulnerability in the
Advanced Linux Sound Architecture (ALSA) subsystem. A physically proximate
attacker could use this to cause a denial of service (system crash).
(CVE-2018-19824)
Shlomi Oberman, Yuli Shapiro, and Ran Menscher discovered an information
leak in the Bluetooth implementation of the Linux kernel. An attacker
within Bluetooth range could use this to expose sensitive information
(kernel memory). (CVE-2019-3459, CVE-2019-3460)
Jann Horn discovered that the KVM implementation in th
OSV
linux, linux-aws, linux-kvm, linux-raspi2, linux-snapdragon vulnerabilities
osv·2019-04-02·CVSS 7.0
CVE-2017-18249 [HIGH] linux, linux-aws, linux-kvm, linux-raspi2, linux-snapdragon vulnerabilities
linux, linux-aws, linux-kvm, linux-raspi2, linux-snapdragon vulnerabilities
It was discovered that a race condition existed in the f2fs file system
implementation in the Linux kernel. A local attacker could use this to
cause a denial of service. (CVE-2017-18249)
Wen Xu discovered that the f2fs file system implementation in the Linux
kernel did not properly validate metadata. An attacker could use this to
construct a malicious f2fs image that, when mounted, could cause a denial
of service (system crash). (CVE-2018-13097, CVE-2018-13099, CVE-2018-13100,
CVE-2018-14614, CVE-2018-14616)
Wen Xu and Po-Ning Tseng discovered that btrfs file system implementation
in the Linux kernel did not properly validate metadata. An attacker could
use this to construct a malicious btrfs image that, when mo
OSV
linux-hwe, linux-aws-hwe, linux-azure, linux-gcp, linux-oracle vulnerabilities
osv·2019-04-02·CVSS 7.8
[HIGH] linux-hwe, linux-aws-hwe, linux-azure, linux-gcp, linux-oracle vulnerabilities
linux-hwe, linux-aws-hwe, linux-azure, linux-gcp, linux-oracle vulnerabilities
USN-3931-1 fixed vulnerabilities in the Linux kernel for Ubuntu 18.04
LTS. This update provides the corresponding updates for the Linux
Hardware Enablement (HWE) kernel from Ubuntu 18.04 LTS for Ubuntu
16.04 LTS and for the Linux Azure kernel for Ubuntu 14.04 LTS.
M. Vefa Bicakci and Andy Lutomirski discovered that the kernel did not
properly set up all arguments to an error handler callback used when
running as a paravirtualized guest. An unprivileged attacker in a
paravirtualized guest VM could use this to cause a denial of service (guest
VM crash). (CVE-2018-14678)
It was discovered that the KVM implementation in the Linux kernel on ARM
64bit processors did not properly handle some ioctls. An attacker with
OSV
CVE-2019-7221: The KVM implementation in the Linux kernel through 4
osv·2019-03-21·CVSS 7.8
CVE-2019-7221 [HIGH] CVE-2019-7221: The KVM implementation in the Linux kernel through 4
The KVM implementation in the Linux kernel through 4.20.5 has a Use-after-Free.
Kernel
Merge tag 'v5.0-rc6' into for-5.1/block
kernel_security·2019-02-15·CVSS 8.1
CVE-2019-6974 [HIGH] Merge tag 'v5.0-rc6' into for-5.1/block
Merge tag 'v5.0-rc6' into for-5.1/block
Pull in 5.0-rc6 to avoid a dumb merge conflict with fs/iomap.c.
This is needed since io_uring is now based on the block branch,
to avoid a conflict between the multi-page bvecs and the bits
of io_uring that touch the core block parts.
* tag 'v5.0-rc6': (525 commits)
Linux 5.0-rc6
x86/mm: Make set_pmd_at() paravirt aware
MAINTAINERS: Update the ocores i2c bus driver maintainer, etc
blk-mq: remove duplicated definition of blk_mq_freeze_queue
Blk-iolatency: warn on negative inflight IO counter
blk-iolatency: fix IO hang due to negative inflight counter
MAINTAINERS: unify reference to xen-devel list
x86/mm/cpa: Fix set_mce_nospec()
futex: Handle early deadlock return correctly
futex: Fix barrier comment
net: dsa: b53: Fix for failure when irq is not de
Kernel
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
kernel_security·2019-02-07·CVSS 8.1
CVE-2019-6974 [HIGH] Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull KVM fixes from Paolo Bonzini:
"Three security fixes"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
KVM: nVMX: unconditionally cancel preemption timer in free_nested (CVE-2019-7221)
KVM: x86: work around leak of uninitialized stack contents (CVE-2019-7222)
kvm: fix kvm_ioctl_create_device() reference counting (CVE-2019-6974)
Kernel
KVM: nVMX: unconditionally cancel preemption timer in free_nested (CVE-2019-7221)
kernel_security·2018-10-11·CVSS 7.8
CVE-2019-7221 [HIGH] KVM: nVMX: unconditionally cancel preemption timer in free_nested (CVE-2019-7221)
KVM: nVMX: unconditionally cancel preemption timer in free_nested (CVE-2019-7221)
Bugzilla: 1671904
There are multiple code paths where an hrtimer may have been started to
emulate an L1 VMX preemption timer that can result in a call to free_nested
without an intervening L2 exit where the hrtimer is normally
cancelled. Unconditionally cancel in free_nested to cover all cases.
Embargoed until Feb 7th 2019.
Signed-off-by: Peter Shier
Reported-by: Jim Mattson
Reviewed-by: Jim Mattson
Reported-by: Felix Wilhelm
Cc: [email protected]
Message-Id:
Signed-off-by: Paolo Bonzini
Ubuntu
Linux kernel (HWE) vulnerabilities
vendor_ubuntu·2019-04-02·CVSS 7.8
CVE-2018-14678 [HIGH] Linux kernel (HWE) vulnerabilities
Title: Linux kernel (HWE) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
USN-3931-1 fixed vulnerabilities in the Linux kernel for Ubuntu 18.04
LTS. This update provides the corresponding updates for the Linux
Hardware Enablement (HWE) kernel from Ubuntu 18.04 LTS for Ubuntu
16.04 LTS and for the Linux Azure kernel for Ubuntu 14.04 LTS.
M. Vefa Bicakci and Andy Lutomirski discovered that the kernel did not
properly set up all arguments to an error handler callback used when
running as a paravirtualized guest. An unprivileged attacker in a
paravirtualized guest VM could use this to cause a denial of service (guest
VM crash). (CVE-2018-14678)
It was discovered that the KVM implementation in the Linux kernel on ARM
64bit processors did not properly handle
Ubuntu
Linux kernel (HWE) vulnerabilities
vendor_ubuntu·2019-04-02·CVSS 7.8
CVE-2018-19824 [HIGH] Linux kernel (HWE) vulnerabilities
Title: Linux kernel (HWE) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
USN-3930-1 fixed vulnerabilities in the Linux kernel for Ubuntu 18.10.
This update provides the corresponding updates for the Linux Hardware
Enablement (HWE) kernel from Ubuntu 18.10 for Ubuntu 18.04 LTS.
Mathias Payer and Hui Peng discovered a use-after-free vulnerability in the
Advanced Linux Sound Architecture (ALSA) subsystem. A physically proximate
attacker could use this to cause a denial of service (system crash).
(CVE-2018-19824)
Shlomi Oberman, Yuli Shapiro, and Ran Menscher discovered an information
leak in the Bluetooth implementation of the Linux kernel. An attacker
within Bluetooth range could use this to expose sensitive information
(kernel memory). (CVE-2019-3459, C
Ubuntu
Linux kernel vulnerabilities
vendor_ubuntu·2019-04-02·CVSS 7.0
CVE-2017-18249 [HIGH] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
It was discovered that a race condition existed in the f2fs file system
implementation in the Linux kernel. A local attacker could use this to
cause a denial of service. (CVE-2017-18249)
Wen Xu discovered that the f2fs file system implementation in the Linux
kernel did not properly validate metadata. An attacker could use this to
construct a malicious f2fs image that, when mounted, could cause a denial
of service (system crash). (CVE-2018-13097, CVE-2018-13099, CVE-2018-13100,
CVE-2018-14614, CVE-2018-14616)
Wen Xu and Po-Ning Tseng discovered that btrfs file system implementation
in the Linux kernel did not properly validate metadata. An attacker could
use this to construct a malicious
Ubuntu
Linux kernel vulnerabilities
vendor_ubuntu·2019-04-02·CVSS 7.8
CVE-2018-14678 [HIGH] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
M. Vefa Bicakci and Andy Lutomirski discovered that the kernel did not
properly set up all arguments to an error handler callback used when
running as a paravirtualized guest. An unprivileged attacker in a
paravirtualized guest VM could use this to cause a denial of service (guest
VM crash). (CVE-2018-14678)
It was discovered that the KVM implementation in the Linux kernel on ARM
64bit processors did not properly handle some ioctls. An attacker with the
privilege to create KVM-based virtual machines could use this to cause a
denial of service (host system crash) or execute arbitrary code in the
host. (CVE-2018-18021)
Mathias Payer and Hui Peng discovered a use-after-free vulnerability i
Ubuntu
Linux kernel (Xenial HWE) vulnerabilities
vendor_ubuntu·2019-04-02·CVSS 7.0
CVE-2017-18249 [HIGH] Linux kernel (Xenial HWE) vulnerabilities
Title: Linux kernel (Xenial HWE) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
USN-3932-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.04
LTS. This update provides the corresponding updates for the Linux
Hardware Enablement (HWE) kernel from Ubuntu 16.04 LTS for Ubuntu
14.04 LTS.
It was discovered that a race condition existed in the f2fs file system
implementation in the Linux kernel. A local attacker could use this to
cause a denial of service. (CVE-2017-18249)
Wen Xu discovered that the f2fs file system implementation in the Linux
kernel did not properly validate metadata. An attacker could use this to
construct a malicious f2fs image that, when mounted, could cause a denial
of service (system crash). (CVE-2018-13097, CVE-2018-13099, CVE
Ubuntu
Linux kernel vulnerabilities
vendor_ubuntu·2019-04-02·CVSS 7.8
CVE-2018-19824 [HIGH] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Mathias Payer and Hui Peng discovered a use-after-free vulnerability in the
Advanced Linux Sound Architecture (ALSA) subsystem. A physically proximate
attacker could use this to cause a denial of service (system crash).
(CVE-2018-19824)
Shlomi Oberman, Yuli Shapiro, and Ran Menscher discovered an information
leak in the Bluetooth implementation of the Linux kernel. An attacker
within Bluetooth range could use this to expose sensitive information
(kernel memory). (CVE-2019-3459, CVE-2019-3460)
Jann Horn discovered that the KVM implementation in the Linux kernel
contained a use-after-free vulnerability. An attacker in a guest VM with
access to /dev/kvm could use this to cause a denial of
Red Hat
Kernel: KVM: nVMX: use-after-free of the hrtimer for emulation of the preemption timer
vendor_redhat·2019-02-07·CVSS 7.8
CVE-2019-7221 [HIGH] CWE-416 Kernel: KVM: nVMX: use-after-free of the hrtimer for emulation of the preemption timer
Kernel: KVM: nVMX: use-after-free of the hrtimer for emulation of the preemption timer
The KVM implementation in the Linux kernel through 4.20.5 has a Use-after-Free.
A use-after-free vulnerability was found in the way the Linux kernel's KVM hypervisor emulates a preemption timer for L2 guests when nested (=1) virtualization is enabled. This high resolution timer(hrtimer) runs when a L2 guest is active. After VM exit, the sync_vmcs12() timer object is stopped. The use-after-free occurs if the timer object is freed before calling sync_vmcs12() routine. A guest user/process could use this flaw to crash the host kernel resulting in a denial of service or, potentially, gain privileged access to a system.
Statement: This issue does not affect the version of the kernel package as shipped with
Debian
CVE-2019-7221: linux - The KVM implementation in the Linux kernel through 4.20.5 has a Use-after-Free.
vendor_debian·2019·CVSS 7.8
CVE-2019-7221 [HIGH] CVE-2019-7221: linux - The KVM implementation in the Linux kernel through 4.20.5 has a Use-after-Free.
The KVM implementation in the Linux kernel through 4.20.5 has a Use-after-Free.
Scope: local
bookworm: resolved (fixed in 4.19.20-1)
bullseye: resolved (fixed in 4.19.20-1)
forky: resolved (fixed in 4.19.20-1)
sid: resolved (fixed in 4.19.20-1)
trixie: resolved (fixed in 4.19.20-1)
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2019-7221 kernel: KVM: nVMX: use-after-free of the hrtimer for emulation of the preemption timer [fedora-all]
bugzilla·2019-02-07·CVSS 7.8
CVE-2019-7221 [HIGH] CVE-2019-7221 kernel: KVM: nVMX: use-after-free of the hrtimer for emulation of the preemption timer [fedora-all]
CVE-2019-7221 kernel: KVM: nVMX: use-after-free of the hrtimer for emulation of the preemption timer [fedora-all]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of fedora-all.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When submitting as an update, use the fedpkg template provided in the next
comment(s). This will include the bug IDs of this tracking bug as well as
the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
fedpkg commit message.
NOTE: this issue
Bugzilla
CVE-2019-7221 Kernel: KVM: nVMX: use-after-free of the hrtimer for emulation of the preemption timer
bugzilla·2019-02-02·CVSS 7.8
CVE-2019-7221 [HIGH] CVE-2019-7221 Kernel: KVM: nVMX: use-after-free of the hrtimer for emulation of the preemption timer
CVE-2019-7221 Kernel: KVM: nVMX: use-after-free of the hrtimer for emulation of the preemption timer
A use after free issue was found in the way Linux kernel's KVM hypervisor
emulates a preemption timer for L2 guest when nested(=1) virtualization
is enabled. This high resolution timer(hrtimer) runs when L2 guest is active.
After VM exit, in sync_vmcs12() timer object is stopped. The use-after-free
occurs if the timer object is free'd before calling sync_vmcs12() routine.
A guest user/process could use this flaw to crash the host kernel resulting
in DoS OR potentially gain privileged access to a system.
It affects only Intel processors and only when nested virtualization is
enabled.
Upstream patch:
-> https://git.kernel.org/linus/ecec76885bcfe3294685dc363fd1273df0d5d65f
Reference:
-> h
http://lists.opensuse.org/opensuse-security-announce/2019-02/msg00042.htmlhttp://packetstormsecurity.com/files/151713/KVM-VMX-Preemption-Timer-Use-After-Free.htmlhttp://www.openwall.com/lists/oss-security/2019/02/18/2https://access.redhat.com/errata/RHBA-2019:0959https://access.redhat.com/errata/RHSA-2019:0818https://access.redhat.com/errata/RHSA-2019:0833https://access.redhat.com/errata/RHSA-2019:3967https://access.redhat.com/errata/RHSA-2019:4058https://bugs.chromium.org/p/project-zero/issues/detail?id=1760https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ecec76885bcfe3294685dc363fd1273df0d5d65fhttps://github.com/torvalds/linux/commits/master/arch/x86/kvmhttps://lists.debian.org/debian-lts-announce/2019/03/msg00034.htmlhttps://lists.debian.org/debian-lts-announce/2019/04/msg00004.htmlhttps://lists.debian.org/debian-lts-announce/2019/05/msg00002.htmlhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KDOXCX3QFVWYXH5CQMGDDE7H6MUG5XGG/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Y2HMABEMJDPA6LPCBE5WIEZXUKY7DLTN/https://security.netapp.com/advisory/ntap-20190404-0002/https://support.f5.com/csp/article/K08413011https://usn.ubuntu.com/3930-1/https://usn.ubuntu.com/3930-2/https://usn.ubuntu.com/3931-1/https://usn.ubuntu.com/3931-2/https://usn.ubuntu.com/3932-1/https://usn.ubuntu.com/3932-2/http://lists.opensuse.org/opensuse-security-announce/2019-02/msg00042.htmlhttp://packetstormsecurity.com/files/151713/KVM-VMX-Preemption-Timer-Use-After-Free.htmlhttp://www.openwall.com/lists/oss-security/2019/02/18/2https://access.redhat.com/errata/RHBA-2019:0959https://access.redhat.com/errata/RHSA-2019:0818https://access.redhat.com/errata/RHSA-2019:0833https://access.redhat.com/errata/RHSA-2019:3967https://access.redhat.com/errata/RHSA-2019:4058https://bugs.chromium.org/p/project-zero/issues/detail?id=1760https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ecec76885bcfe3294685dc363fd1273df0d5d65fhttps://github.com/torvalds/linux/commits/master/arch/x86/kvmhttps://lists.debian.org/debian-lts-announce/2019/03/msg00034.htmlhttps://lists.debian.org/debian-lts-announce/2019/04/msg00004.htmlhttps://lists.debian.org/debian-lts-announce/2019/05/msg00002.htmlhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KDOXCX3QFVWYXH5CQMGDDE7H6MUG5XGG/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Y2HMABEMJDPA6LPCBE5WIEZXUKY7DLTN/https://security.netapp.com/advisory/ntap-20190404-0002/https://support.f5.com/csp/article/K08413011https://usn.ubuntu.com/3930-1/https://usn.ubuntu.com/3930-2/https://usn.ubuntu.com/3931-1/https://usn.ubuntu.com/3931-2/https://usn.ubuntu.com/3932-1/https://usn.ubuntu.com/3932-2/
2019-03-21
Published