vulnerability
Ubuntu: (CVE-2021-47342): linux-fips vulnerability
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 7 | (AV:L/AC:L/Au:S/C:C/I:C/A:C) | May 21, 2024 | Jun 26, 2025 | Aug 18, 2025 |
Severity
7
CVSS
(AV:L/AC:L/Au:S/C:C/I:C/A:C)
Published
May 21, 2024
Added
Jun 26, 2025
Modified
Aug 18, 2025
Description
In the Linux kernel, the following vulnerability has been resolved:
ext4: fix possible UAF when remounting r/o a mmp-protected file system
After commit 618f003199c6 ("ext4: fix memory leak in
ext4_fill_super"), after the file system is remounted read-only, there
is a race where the kmmpd thread can exit, causing sbi->s_mmp_tsk to
point at freed memory, which the call to ext4_stop_mmpd() can trip
over.
Fix this by only allowing kmmpd() to exit when it is stopped via
ext4_stop_mmpd().
Bug-Report-Link: <[email protected]>
Solution
no-fix-ubuntu-package
References
- CVE-2021-47342
- https://attackerkb.com/topics/CVE-2021-47342
- CWE-416
- URL-https://git.kernel.org/linus/61bb4a1c417e5b95d9edb4f887f131de32e419cb
- URL-https://git.kernel.org/stable/c/61bb4a1c417e5b95d9edb4f887f131de32e419cb
- URL-https://git.kernel.org/stable/c/7ed572cdf11081f8f9e07abd4bea56a3f2c4edbd
- URL-https://git.kernel.org/stable/c/b663890d854403e566169f7e90aed5cd6ff64f6b
- URL-https://www.cve.org/CVERecord?id=CVE-2021-47342
NEW
Explore Exposure Command
Confidently identify and prioritize exposures from endpoint to cloud with full attack surface visibility and threat-aware risk context.