NULL pointer dereference in Linux kernel - CVE-2026-31559
Published: April 25, 2026
Vulnerability identifier: #VU127834
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-2026-31559
CWE-ID: CWE-476
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local attacker to cause a denial of service.
The vulnerability exists due to improper handling of a NULL pointer in cpu model parsing from device tree when memory allocation fails during early boot. A local attacker can trigger memory allocation failure during device tree parsing to cause a denial of service.
The issue can lead to a kernel oops during early boot.
Affected software
Linux kernel
Debian Linux
linux (Debian package)
Debian Linux
linux (Debian package)
How to mitigate CVE-2026-31559
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