NULL pointer dereference in Linux kernel - CVE-2026-89460
Published: September 12, 2026
Vulnerability identifier: #VU149356
CSH Severity: Low
CVSS v4: 5.6 [CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-89460
CWE-ID: CWE-476
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local privileged user to cause a denial of service.
The vulnerability exists due to a null pointer dereference in the s390 CPUMF performance monitoring unit when a CPU is added while a per-task CPUMF performance event is running. A local privileged user can trigger CPU hotplug during execution of a per-task performance event to cause a denial of service.
Affected software
Linux kernel
How to mitigate CVE-2026-89460
Install security update from vendor's repository.