Improper input validation in Linux kernel - CVE-2026-90299
Published: September 18, 2026
Vulnerability identifier: #VU151182
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-90299
CWE-ID: CWE-20
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 improper input validation in the BPF verifier's sleepable-program target check when attaching a sleepable tracing BPF program to a BPF program target with a '__x64_'-alike prefix. A local user can attach a sleepable tracing BPF program to such a target to cause a denial of service.
The issue occurs when CONFIG_FUNCTION_ERROR_INJECTION is disabled.
Affected software
Linux kernel
How to mitigate CVE-2026-90299
Install security update from vendor's repository.