CVE-2021-45868: Use After Free
First published: Fri Mar 18 2022(Updated: )
In the Linux kernel before 5.15.3, fs/quota/quota_tree.c does not validate the block number in the quota tree (on disk). This can, for example, lead to a kernel/locking/rwsem.c use-after-free if there is a corrupted quota file.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | <5.15.3 | |
| All of | ||
| netapp h300s firmware | ||
| netapp h300s | ||
| All of | ||
| netapp h700s firmware | ||
| netapp h700s | ||
| All of | ||
| netapp h300e firmware | ||
| netapp h300e | ||
| All of | ||
| netapp h500e firmware | ||
| netapp h500e | ||
| All of | ||
| netapp h700e firmware | ||
| netapp h700e | ||
| All of | ||
| netapp h410s firmware | ||
| netapp h410s | ||
| All of | ||
| netapp h410c firmware | ||
| netapp h410c | ||
| All of | ||
| NetApp H500S Firmware | ||
| netapp h500s | ||
| netapp h300s firmware | ||
| netapp h300s | ||
| netapp h700s firmware | ||
| netapp h700s | ||
| netapp h300e firmware | ||
| netapp h300e | ||
| netapp h500e firmware | ||
| netapp h500e | ||
| netapp h700e firmware | ||
| netapp h700e | ||
| netapp h410s firmware | ||
| netapp h410s | ||
| netapp h410c firmware | ||
| netapp h410c | ||
| NetApp H500S Firmware | ||
| netapp h500s | ||
| debian/linux | 5.10.223-1 5.10.226-1 6.1.123-1 6.1.128-1 6.12.12-1 6.12.15-1 |
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Reference Links
- https://bugzilla.kernel.org/show_bug.cgi?id=214655
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.3
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9bf3d20331295b1ecb81f4ed9ef358c51699a050
- https://www.openwall.com/lists/oss-security/2022/03/17/1
- https://www.openwall.com/lists/oss-security/2022/03/17/2
- https://security.netapp.com/advisory/ntap-20220419-0003/
- https://launchpad.net/bugs/cve/CVE-2021-45868
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-45868
- https://nvd.nist.gov/vuln/detail/CVE-2021-45868
- https://security-tracker.debian.org/tracker/CVE-2021-45868
- https://ubuntu.com/security/CVE-2021-45868
- https://git.kernel.org/linus/9bf3d20331295b1ecb81f4ed9ef358c51699a050
Frequently Asked Questions
What is the severity of CVE-2021-45868?
CVE-2021-45868 has a high severity due to its potential to cause a use-after-free vulnerability in the Linux kernel.
How do I fix CVE-2021-45868?
To fix CVE-2021-45868, update to the following Linux kernel versions: 5.10.223-1, 5.10.226-1, 6.1.123-1, 6.1.128-1, 6.12.12-1, or 6.12.13-1.
Which versions of the Linux kernel are affected by CVE-2021-45868?
CVE-2021-45868 affects the Linux kernel versions earlier than 5.15.3.
What types of systems are impacted by CVE-2021-45868?
CVE-2021-45868 primarily impacts systems running the Linux kernel prior to version 5.15.3.
Is there any workaround for CVE-2021-45868?
There is no specific workaround for CVE-2021-45868; the recommended action is to apply the relevant updates to the kernel.
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- source/Launchpad
- agent/severity
- agent/weakness
- collector/mitre-cve
- source/MITRE
- agent/references
- agent/last-modified-date
- agent/remedy
- agent/description
- agent/first-publish-date
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- source/NVD
- agent/software-canonical-lookup
- agent/software-canonical-lookup-request
- collector/nvd-index
- agent/tags
- agent/author
- agent/softwarecombine
- collector/usn-cve
- source/Ubuntu
- collector/security-tracker-debian
- source/Debian
- vendor/linux
- canonical/linux kernel
- vendor/netapp
- canonical/netapp h300s firmware
- canonical/netapp h300s
- canonical/netapp h700s firmware
- canonical/netapp h700s
- canonical/netapp h300e firmware
- canonical/netapp h300e
- canonical/netapp h500e firmware
- canonical/netapp h500e
- canonical/netapp h700e firmware
- canonical/netapp h700e
- canonical/netapp h410s firmware
- canonical/netapp h410s
- canonical/netapp h410c firmware
- canonical/netapp h410c
- canonical/netapp h500s firmware
- canonical/netapp h500s
- package-manager/debian