SB2025100330 - Improper locking in Linux kernel ext4
Published: October 3, 2025 Updated: October 27, 2025
Security Bulletin ID
SB2025100330
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Improper locking (CVE-ID: CVE-2022-50436)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper locking within the ext4_rmdir(), __ext4_unlink() and ext4_unlink() functions in fs/ext4/namei.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/1ba993208bcfd691e241483420a2a761d3f15750
- https://git.kernel.org/stable/c/206dd3acfb9bca54a25b228c7c7c2257eedde09b
- https://git.kernel.org/stable/c/23ad034760dd38e12b0e0e1b28b9629f330810a1
- https://git.kernel.org/stable/c/4c0d5778385cb3618ff26a561ce41de2b7d9de70
- https://git.kernel.org/stable/c/6220ec405571ded17efedc56587190b542adf246
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.87