SB20251226136 - Use-after-free in Linux kernel f2fs
Published: December 26, 2025 Updated: December 31, 2025
Security Bulletin ID
SB20251226136
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-2022-50753)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the check_index_in_prev_nodes() function in fs/f2fs/recovery.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/0922ad64ccefa3e483e84355942b86e13c8fea68
- https://git.kernel.org/stable/c/4a8e8bf280703e04e0b9d91f101e1fdd9a5bd09e
- https://git.kernel.org/stable/c/73687c53919f49dff3852155621dab7a35c52854
- https://git.kernel.org/stable/c/c6ad7fd16657ebd34a87a97d9588195aae87597d
- https://git.kernel.org/stable/c/c99860f9a75079f339ed7670425b1ac58f26e2ff
- https://git.kernel.org/stable/c/e168f819bfa42459b14f479e55ebd550bcc78899
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.19.17