NULL Pointer Dereference in Linux kernel - CVE-2026-23251
Published: March 20, 2026
Vulnerability identifier: #VU124197
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-23251
CWE-ID: CWE-476
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a use-after-free in the XFS filesystem component when handling file operations. A local user can trigger improper pointer management to cause a denial of service.
The vulnerability specifically involves calling destructors on invalid pointers in the xfarray and xfblob structures, which can lead to system instability or crash.
How to mitigate CVE-2026-23251
Install security update from vendor's repository.