Incorrect calculation in Linux kernel - CVE-2026-98042
Published: October 4, 2026
Vulnerability identifier: #VU153235
CSH Severity: Low
CVSS v4: 0 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-98042
CWE-ID: CWE-682
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause incorrect BPF verifier register-range tracking.
The vulnerability exists due to improper handling of scalar IDs in the BPF verifier check_cond_jmp_op() function when processing conditional jumps involving linked scalar registers. A local user can submit a BPF program with many linked registers to cause incorrect BPF verifier register-range tracking.
Linked-register groups that exceed the verifier tracking limit are required.
Affected software
Linux kernel
How to mitigate CVE-2026-98042
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3