NULL Pointer Dereference in Linux kernel - CVE-2026-23251
Published: March 20, 2026
Vulnerability identifier: #VU124197
CSH Severity: Low
CVSS v4: 6.8 [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]
CVE-ID: CVE-2026-23251
CWE-ID: CWE-476
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
Linux kernel
Debian Linux
linux (Debian package)
Debian Linux
linux (Debian package)
How to mitigate CVE-2026-23251
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
linux (Debian package) - update to 6.12.85-1
linux (Debian package) - update to 6.12.85-1