SB2026030459 - Use-after-free in Linux kernel f2fs
Published: March 4, 2026
Security Bulletin ID
SB2026030459
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-2026-23234)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the f2fs_write_end_io() function in fs/f2fs/data.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/0fb58aff0dafd6837cc91f4154f3ed6e020358fa
- https://git.kernel.org/stable/c/2f67ff1e15a8a4d0e4ffc6564ab20d03d7398fe9
- https://git.kernel.org/stable/c/505e1c0530db6152cab3feef8e3e4da3d3e358c9
- https://git.kernel.org/stable/c/995030be4ce6338c6ff814583c14166446a64008
- https://git.kernel.org/stable/c/a42f99be8a16b32a0bb91bb6dda212a6ad61be5d
- https://git.kernel.org/stable/c/acc2c97fc0005846e5cf11b5ba3189fef130c9b3
- https://git.kernel.org/stable/c/ce2739e482bce8d2c014d76c4531c877f382aa54
- https://git.kernel.org/stable/c/cf4a9e1bc8129eb63fda5f8bdcd8d87f0bd76f42