Improper locking in Linux kernel - CVE-2026-90046
Published: September 16, 2026
Vulnerability identifier: #VU150248
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-90046
CWE-ID: CWE-667
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to escalate privileges or cause a kernel crash.
The vulnerability exists due to unsafe locking in the page allocator free path when BPF programs use affected features in NMI on non-SMP builds. A local user can execute BPF programs using these features in NMI to escalate privileges or cause a kernel crash.
Affected software
Linux kernel
How to mitigate CVE-2026-90046
Install security update from vendor's repository.