SB2025100307 - Use-after-free in Linux kernel kernfs
Published: October 3, 2025 Updated: October 27, 2025
Security Bulletin ID
SB2025100307
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Use-after-free (CVE-ID: CVE-2022-50432)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the kernfs_remove_by_name_ns() function in fs/kernfs/dir.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/028cf780743eea79abffa7206b9dcfc080ad3546
- https://git.kernel.org/stable/c/02eb35131050735332658029082f61515b7dfe38
- https://git.kernel.org/stable/c/4abc99652812a2ddf932f137515d5c5a04723538
- https://git.kernel.org/stable/c/4dfd6a477a1525773469feaf3c514b2c0fef76b5
- https://git.kernel.org/stable/c/6f72a3977ba9d0e5491a5c01315204272e7f9c44
- https://git.kernel.org/stable/c/94d2643df1e70a4c310ebb5e2c493eec33df1a06
- https://git.kernel.org/stable/c/af1b57cc39beca203559576b3046094fc9e5eb32
- https://git.kernel.org/stable/c/c78b0dc6fb7fb389d674e491fd376388cdfb1d53
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.223