NULL pointer dereference in Linux kernel - CVE-2026-98059
Published: September 28, 2026
Vulnerability identifier: #VU152419
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-98059
CWE-ID: CWE-476
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 null pointer handling in the BPF verifier handling of the sched_process_wait tracepoint argument when executing a JITed BPF program that dereferences the argument without a NULL check. A local user can execute a JITed BPF program with an unchecked dereference and trigger a wait for any child to cause a denial of service.
The tracepoint argument can be NULL for wait4(-1) and waitid(P_ALL).
Affected software
Linux kernel
How to mitigate CVE-2026-98059
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3