Improper input validation in Linux kernel - CVE-2026-98132
Published: September 28, 2026
Vulnerability identifier: #VU152316
CSH Severity: Low
CVSS v4: 2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-98132
CWE-ID: CWE-20
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause incorrect BPF verifier precision propagation.
The vulnerability exists due to improper verifier state handling in __clean_func_state() in kernel/bpf/states.c when cleaning function state for an 8-byte scalar zero stack spill with a half-dead slot. A local user can trigger the affected stack-state cleanup to cause incorrect BPF verifier precision propagation.
Affected software
Linux kernel
How to mitigate CVE-2026-98132
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3