CVE-2021-20321
published 2022-02-18CVE-2021-20321: A race condition accessing file object in the Linux kernel OverlayFS subsystem was found in the way users do rename in specific way with OverlayFS. A local…
medium4.7CVSS 3.1
AVLACHPRLUINSUCNINAH
A race condition accessing file object in the Linux kernel OverlayFS subsystem was found in the way users do rename in specific way with OverlayFS. A local user could use this flaw to crash the system.
Affected
20 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | debian_linux | — | — |
| debian | debian_linux | — | — |
| debian | linux | < linux 5.14.12-1 (bookworm) | linux 5.14.12-1 (bookworm) |
| linux | linux_kernel | < 5.15 | 5.15 |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 0 < 5.10.84-1 | 5.10.84-1 |
| linux | linux_kernel | >= 0 < 5.14.12-1 | 5.14.12-1 |
| linux | linux_kernel | >= 0 < 5.14.12-1 | 5.14.12-1 |
| linux | linux_kernel | >= 0 < 5.14.12-1 | 5.14.12-1 |
| linux | linux_kernel | >= 0 < 4.15.0-166.174 | 4.15.0-166.174 |
| linux | linux_kernel | >= 0 < 5.4.0-92.103 | 5.4.0-92.103 |
| linux | linux_kernel | >= 0 < 5.4.0-94.106 | 5.4.0-94.106 |
| linux | linux_kernel | >= 0 < 4.4.0-242.276 | 4.4.0-242.276 |
| msrc | cbl_mariner_1.0_arm | — | — |
| msrc | cbl_mariner_1.0_x64 | — | — |
| msrc | cm1_kernel_5.10.102.1-1_on_cbl_mariner_1.0 | — | — |
| paloalto | pan-os | — | — |
| redhat | enterprise_linux | — | — |
| redhat | enterprise_linux | — | — |
CVSS provenance
nvdv3.14.7MEDIUMCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
osv6.5MEDIUM
Palo Alto
PAN-SA-2024-0001 Informational Bulletin: Impact of OSS CVEs in PAN-OS
vendor_paloalto·2024-02-14·CVSS 9.8
CVE-2017-18342 [CRITICAL] PAN-SA-2024-0001 Informational Bulletin: Impact of OSS CVEs in PAN-OS
PAN-SA-2024-0001 Informational Bulletin: Impact of OSS CVEs in PAN-OS
The Palo Alto Networks Product Security Assurance team has evaluated the following open source software (OSS) CVEs as they relate to PAN-OS software. While PAN-OS software may include the
CVEs: CVE-2017-18342, CVE-2017-8923, CVE-2017-9120, CVE-2019-1551, CVE-2019-16865, CVE-2019-16905, CVE-2019-19523, CVE-2019-19528, CVE-2019-19911, CVE-2020-0404, CVE-2020-0431, CVE-2020-0466, CVE-2020-10379, CVE-2020-11538, CVE-2020-11608, CVE-2020-12114, CVE-2020-12321, CVE-2020-12362, CVE-2020-12363, CVE-2020-12364, CVE-2020-13757, CVE-2020-14314, CVE-2020-14351, CVE-2020-15778, CVE-2020-1967, CVE-2020-24394, CVE-2020-24504, CVE-2020-25211, CVE-2020-25212, CVE-2020-25284, CVE-2020-25285, CVE-2020-25717, CVE-2020-26541, CVE-2020-2715
Ubuntu
Linux kernel vulnerabilities
vendor_ubuntu·2023-07-12·CVSS 4.7
CVE-2022-29901 [MEDIUM] 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 overlay file system
implementation in the Linux kernel. A local attacker could use this to
cause a denial of service (system crash). (CVE-2021-20321)
It was discovered that the virtual terminal (vt) device implementation in
the Linux kernel contained a race condition in its ioctl handling that led
to an out-of-bounds read vulnerability. A local attacker could possibly use
this to expose sensitive information. (CVE-2021-3753)
It was discovered that the ext4 file system implementation in the Linux
kernel contained a use-after-free vulnerability. An attacker could use this
to construct a malicious ext4 file system image that, when moun
Microsoft
A race condition accessing file object in the Linux kernel OverlayFS subsystem was found in the way users do rename in specific way with OverlayFS. A local user could use this flaw to crash the system
vendor_msrc·2022-02-08·CVSS 4.7
CVE-2021-20321 [MEDIUM] CWE-362 A race condition accessing file object in the Linux kernel OverlayFS subsystem was found in the way users do rename in specific way with OverlayFS. A local user could use this flaw to crash the system
A race condition accessing file object in the Linux kernel OverlayFS subsystem was found in the way users do rename in specific way with OverlayFS. A local user could use this flaw to crash the system.
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 th
Ubuntu
Linux kernel regression
vendor_ubuntu·2022-01-12·CVSS 6.5
[MEDIUM] Linux kernel regression
Title: Linux kernel regression
Summary: USN-5210-1 introduced a regression in the Linux kernel.
USN-5210-1 fixed vulnerabilities in the Linux kernel. Unfortunately,
that update introduced a regression that caused failures to boot in
environments with AMD Secure Encrypted Virtualization (SEV) enabled.
This update fixes the problem.
We apologize for the inconvenience.
Original advisory details:
Nadav Amit discovered that the hugetlb implementation in the Linux kernel
did not perform TLB flushes under certain conditions. A local attacker
could use this to leak or alter data from other processes that use huge
pages. (CVE-2021-4002)
It was discovered that the Linux kernel did not properly enforce certain
types of entries in the Secure Boot Forbidden Signature Database (aka dbx)
protection
Ubuntu
Linux kernel (OEM) vulnerabilities
vendor_ubuntu·2022-01-11·CVSS 4.7
CVE-2021-41864 [MEDIUM] Linux kernel (OEM) vulnerabilities
Title: Linux kernel (OEM) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Nadav Amit discovered that the hugetlb implementation in the Linux kernel
did not perform TLB flushes under certain conditions. A local attacker
could use this to leak or alter data from other processes that use huge
pages. (CVE-2021-4002)
It was discovered that the eBPF implementation in the Linux kernel did
not properly validate the memory size of certain ring buffer operation
arguments. A local attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2021-4204)
It was discovered that a race condition existed in the overlay file system
implementation in the Linux kernel. A local attacker could use this to
cause a denial of serv
Ubuntu
Linux kernel vulnerabilities
vendor_ubuntu·2022-01-06·CVSS 4.4
CVE-2021-4002 [MEDIUM] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Nadav Amit discovered that the hugetlb implementation in the Linux kernel
did not perform TLB flushes under certain conditions. A local attacker
could use this to leak or alter data from other processes that use huge
pages. (CVE-2021-4002)
It was discovered that a race condition existed in the timer implementation
in the Linux kernel. A privileged attacker could use this cause a denial of
service. (CVE-2021-20317)
It was discovered that a race condition existed in the overlay file system
implementation in the Linux kernel. A local attacker could use this to
cause a denial of service (system crash). (CVE-2021-20321)
It was discovered that the NFC subsystem in the Linux kernel contained
Ubuntu
Linux kernel vulnerabilities
vendor_ubuntu·2022-01-06·CVSS 4.7
CVE-2021-43389 [MEDIUM] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Nadav Amit discovered that the hugetlb implementation in the Linux kernel
did not perform TLB flushes under certain conditions. A local attacker
could use this to leak or alter data from other processes that use huge
pages. (CVE-2021-4002)
It was discovered that a race condition existed in the overlay file system
implementation in the Linux kernel. A local attacker could use this to
cause a denial of service (system crash). (CVE-2021-20321)
It was discovered that the NFC subsystem in the Linux kernel contained a
use-after-free vulnerability in its NFC Controller Interface (NCI)
implementation. A local attacker could possibly use this to cause a denial
of service (system crash) or execut
Ubuntu
Linux kernel vulnerabilities
vendor_ubuntu·2022-01-06·CVSS 6.5
CVE-2021-4002 [MEDIUM] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Nadav Amit discovered that the hugetlb implementation in the Linux kernel
did not perform TLB flushes under certain conditions. A local attacker
could use this to leak or alter data from other processes that use huge
pages. (CVE-2021-4002)
It was discovered that the Linux kernel did not properly enforce certain
types of entries in the Secure Boot Forbidden Signature Database (aka dbx)
protection mechanism. An attacker could use this to bypass UEFI Secure Boot
restrictions. (CVE-2020-26541)
It was discovered that a race condition existed in the overlay file system
implementation in the Linux kernel. A local attacker could use this to
cause a denial of service (system crash). (CVE-2021-20
Red Hat
kernel: In Overlayfs missing a check for a negative dentry before calling vfs_rename()
vendor_redhat·2021-10-11·CVSS 4.7
CVE-2021-20321 [MEDIUM] CWE-362 kernel: In Overlayfs missing a check for a negative dentry before calling vfs_rename()
kernel: In Overlayfs missing a check for a negative dentry before calling vfs_rename()
A race condition accessing file object in the Linux kernel OverlayFS subsystem was found in the way users do rename in specific way with OverlayFS. A local user could use this flaw to crash the system.
A race condition accessing file object in the Linux kernel OverlayFS subsystem was found in the way users do rename in specific way with OverlayFS. A local user could use this flaw to crash the system.
Mitigation: Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Package: kernel (Red Hat Enterprise Linux 5) - Not affected
Debian
CVE-2021-20321: linux - A race condition accessing file object in the Linux kernel OverlayFS subsystem w...
vendor_debian·2021·CVSS 4.7
CVE-2021-20321 [MEDIUM] CVE-2021-20321: linux - A race condition accessing file object in the Linux kernel OverlayFS subsystem w...
A race condition accessing file object in the Linux kernel OverlayFS subsystem was found in the way users do rename in specific way with OverlayFS. A local user could use this flaw to crash the system.
Scope: local
bookworm: resolved (fixed in 5.14.12-1)
bullseye: resolved (fixed in 5.10.84-1)
forky: resolved (fixed in 5.14.12-1)
sid: resolved (fixed in 5.14.12-1)
trixie: resolved (fixed in 5.14.12-1)
OSV
linux, linux-aws, linux-kvm, linux-lts-xenial vulnerabilities
osv·2023-07-12·CVSS 4.7
CVE-2021-20321 [MEDIUM] linux, linux-aws, linux-kvm, linux-lts-xenial vulnerabilities
linux, linux-aws, linux-kvm, linux-lts-xenial vulnerabilities
It was discovered that a race condition existed in the overlay file system
implementation in the Linux kernel. A local attacker could use this to
cause a denial of service (system crash). (CVE-2021-20321)
It was discovered that the virtual terminal (vt) device implementation in
the Linux kernel contained a race condition in its ioctl handling that led
to an out-of-bounds read vulnerability. A local attacker could possibly use
this to expose sensitive information. (CVE-2021-3753)
It was discovered that the ext4 file system implementation in the Linux
kernel contained a use-after-free vulnerability. An attacker could use this
to construct a malicious ext4 file system image that, when mounted, could
cause a denial of service (sy
OSV
CVE-2021-20321: In ovl_rename of dir
osv·2022-06-01
CVE-2021-20321 CVE-2021-20321: In ovl_rename of dir
In ovl_rename of dir.c, there is a possible out of bounds write due to a race condition. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.
OSV
CVE-2021-20321: A race condition accessing file object in the Linux kernel OverlayFS subsystem was found in the way users do rename in specific way with OverlayFS
osv·2022-02-18·CVSS 4.7
CVE-2021-20321 [MEDIUM] CVE-2021-20321: A race condition accessing file object in the Linux kernel OverlayFS subsystem was found in the way users do rename in specific way with OverlayFS
A race condition accessing file object in the Linux kernel OverlayFS subsystem was found in the way users do rename in specific way with OverlayFS. A local user could use this flaw to crash the system.
OSV
linux, linux-gcp, linux-gcp-5.4, linux-hwe-5.4 regression
osv·2022-01-12·CVSS 6.5
[MEDIUM] linux, linux-gcp, linux-gcp-5.4, linux-hwe-5.4 regression
linux, linux-gcp, linux-gcp-5.4, linux-hwe-5.4 regression
USN-5210-1 fixed vulnerabilities in the Linux kernel. Unfortunately,
that update introduced a regression that caused failures to boot in
environments with AMD Secure Encrypted Virtualization (SEV) enabled.
This update fixes the problem.
We apologize for the inconvenience.
Original advisory details:
Nadav Amit discovered that the hugetlb implementation in the Linux kernel
did not perform TLB flushes under certain conditions. A local attacker
could use this to leak or alter data from other processes that use huge
pages. (CVE-2021-4002)
It was discovered that the Linux kernel did not properly enforce certain
types of entries in the Secure Boot Forbidden Signature Database (aka dbx)
protection mechanism. An attacker could use this
OSV
linux-oem-5.13 vulnerabilities
osv·2022-01-11·CVSS 4.7
CVE-2021-4002 [MEDIUM] linux-oem-5.13 vulnerabilities
linux-oem-5.13 vulnerabilities
Nadav Amit discovered that the hugetlb implementation in the Linux kernel
did not perform TLB flushes under certain conditions. A local attacker
could use this to leak or alter data from other processes that use huge
pages. (CVE-2021-4002)
It was discovered that the eBPF implementation in the Linux kernel did
not properly validate the memory size of certain ring buffer operation
arguments. A local attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2021-4204)
It was discovered that a race condition existed in the overlay file system
implementation in the Linux kernel. A local attacker could use this to
cause a denial of service (system crash). (CVE-2021-20321)
It was discovered that the NFC subsyste
OSV
linux, linux-aws, linux-aws-5.4, linux-azure, linux-azure-5.4, linux-bluefield, linux-gcp, linux-gcp-5.4, linux-gke, linux-gke-5.4, linux-gkeop, linux-gkeop-5.4, linux-hwe-5.4, linux-ibm, linux-kvm, l
osv·2022-01-06·CVSS 6.5
[MEDIUM] linux, linux-aws, linux-aws-5.4, linux-azure, linux-azure-5.4, linux-bluefield, linux-gcp, linux-gcp-5.4, linux-gke, linux-gke-5.4, linux-gkeop, linux-gkeop-5.4, linux-hwe-5.4, linux-ibm, linux-kvm, l
linux, linux-aws, linux-aws-5.4, linux-azure, linux-azure-5.4, linux-bluefield, linux-gcp, linux-gcp-5.4, linux-gke, linux-gke-5.4, linux-gkeop, linux-gkeop-5.4, linux-hwe-5.4, linux-ibm, linux-kvm, linux-oracle, linux-oracle-5.4, linux-raspi, linux-raspi-5.4 vulnerabilities
Nadav Amit discovered that the hugetlb implementation in the Linux kernel
did not perform TLB flushes under certain conditions. A local attacker
could use this to leak or alter data from other processes that use huge
pages. (CVE-2021-4002)
It was discovered that the Linux kernel did not properly enforce certain
types of entries in the Secure Boot Forbidden Signature Database (aka dbx)
protection mechanism. An attacker could use this to bypass UEFI Secure Boot
restrictions. (CVE-2020-26541)
It was discovered that a r
OSV
linux, linux-aws, linux-aws-hwe, linux-azure-4.15, linux-dell300x, linux-gcp, linux-gcp-4.15, linux-hwe, linux-kvm, linux-oracle, linux-raspi2, linux-snapdragon vulnerabilities
osv·2022-01-06·CVSS 4.4
CVE-2021-4002 [MEDIUM] linux, linux-aws, linux-aws-hwe, linux-azure-4.15, linux-dell300x, linux-gcp, linux-gcp-4.15, linux-hwe, linux-kvm, linux-oracle, linux-raspi2, linux-snapdragon vulnerabilities
linux, linux-aws, linux-aws-hwe, linux-azure-4.15, linux-dell300x, linux-gcp, linux-gcp-4.15, linux-hwe, linux-kvm, linux-oracle, linux-raspi2, linux-snapdragon vulnerabilities
Nadav Amit discovered that the hugetlb implementation in the Linux kernel
did not perform TLB flushes under certain conditions. A local attacker
could use this to leak or alter data from other processes that use huge
pages. (CVE-2021-4002)
It was discovered that a race condition existed in the timer implementation
in the Linux kernel. A privileged attacker could use this to cause a denial
of service. (CVE-2021-20317)
It was discovered that a race condition existed in the overlay file system
implementation in the Linux kernel. A local attacker could use this to
cause a denial of service (system crash). (CVE-2021-2
OSV
linux, linux-aws, linux-aws-5.11, linux-azure, linux-azure-5.11, linux-gcp, linux-gcp-5.11, linux-hwe-5.11, linux-kvm, linux-oracle, linux-oracle-5.11, linux-raspi vulnerabilities
osv·2022-01-06·CVSS 4.7
CVE-2021-4002 [MEDIUM] linux, linux-aws, linux-aws-5.11, linux-azure, linux-azure-5.11, linux-gcp, linux-gcp-5.11, linux-hwe-5.11, linux-kvm, linux-oracle, linux-oracle-5.11, linux-raspi vulnerabilities
linux, linux-aws, linux-aws-5.11, linux-azure, linux-azure-5.11, linux-gcp, linux-gcp-5.11, linux-hwe-5.11, linux-kvm, linux-oracle, linux-oracle-5.11, linux-raspi vulnerabilities
Nadav Amit discovered that the hugetlb implementation in the Linux kernel
did not perform TLB flushes under certain conditions. A local attacker
could use this to leak or alter data from other processes that use huge
pages. (CVE-2021-4002)
It was discovered that a race condition existed in the overlay file system
implementation in the Linux kernel. A local attacker could use this to
cause a denial of service (system crash). (CVE-2021-20321)
It was discovered that the NFC subsystem in the Linux kernel contained a
use-after-free vulnerability in its NFC Controller Interface (NCI)
implementation. A local attacker
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
https://bugzilla.redhat.com/show_bug.cgi?id=2013242https://lists.debian.org/debian-lts-announce/2022/03/msg00012.htmlhttps://lore.kernel.org/all/20211011134508.748956131%40linuxfoundation.org/https://www.debian.org/security/2022/dsa-5096https://bugzilla.redhat.com/show_bug.cgi?id=2013242https://lists.debian.org/debian-lts-announce/2022/03/msg00012.htmlhttps://lore.kernel.org/all/20211011134508.748956131%40linuxfoundation.org/https://www.debian.org/security/2022/dsa-5096
2022-02-18
Published