Always-Incorrect Control Flow Implementation in Linux kernel - CVE-2026-98019
Published: September 28, 2026
Vulnerability identifier: #VU152453
CSH Severity: Low
CVSS v4: 0 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-98019
CWE-ID: CWE-670
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause incorrect BPF verifier state pruning.
The vulnerability exists due to failure to mark scalar registers precise in the BPF verifier's check_func_arg() and check_helper_call() functions when handling nullable function arguments or zero bpf_get_local_storage() flags. A local user can submit BPF code that triggers the affected verification paths to cause incorrect BPF verifier state pruning.
Affected software
Linux kernel
How to mitigate CVE-2026-98019
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3