SB2025091978 - Use-after-free in Linux kernel ext4
Published: September 19, 2025 Updated: September 22, 2025
Security Bulletin ID
SB2025091978
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-2022-50377)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the ext4_evict_inode() function in fs/ext4/inode.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/0c026f975d24701766cf4ac63995ead9f6d57a59
- https://git.kernel.org/stable/c/318cdc822c63b6e2befcfdc2088378ae6fa18def
- https://git.kernel.org/stable/c/9020f56a3cad1c97b81c7dab2aa67027b59c8f73
- https://git.kernel.org/stable/c/91009e361e8cb2cbd1dc9496cb5fb4f8de3f4b11
- https://git.kernel.org/stable/c/f1ec687ebd1bf146333955b7e209d21508c3ba9f
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.4