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 Firmware | ||
| All of | ||
| NetApp H700S | ||
| NetApp H700S | ||
| All of | ||
| NetApp H300E | ||
| NetApp H300E Firmware | ||
| All of | ||
| NetApp H500S Firmware | ||
| NetApp H500e Firmware | ||
| All of | ||
| NetApp H700E | ||
| NetApp H700E | ||
| All of | ||
| NetApp H410S | ||
| NetApp H410S Firmware | ||
| All of | ||
| NetApp H410C | ||
| NetApp H410C Firmware | ||
| All of | ||
| NetApp H500e Firmware | ||
| NetApp H500e Firmware | ||
| NetApp H300S Firmware | ||
| NetApp H300S Firmware | ||
| NetApp H700S | ||
| NetApp H700S | ||
| NetApp H300E | ||
| NetApp H300E Firmware | ||
| NetApp H500S Firmware | ||
| NetApp H500e Firmware | ||
| NetApp H700E | ||
| NetApp H700E | ||
| NetApp H410S | ||
| NetApp H410S Firmware | ||
| NetApp H410C | ||
| NetApp H410C Firmware | ||
| NetApp H500e Firmware | ||
| NetApp H500e Firmware | ||
| debian/linux | 5.10.223-1 5.10.234-1 6.1.129-1 6.1.128-1 6.12.20-1 6.12.21-1 |
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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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