Improper locking in Linux kernel - CVE-2026-98045
Published: September 28, 2026
Vulnerability identifier: #VU152422
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-2026-98045
CWE-ID: CWE-667
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 synchronization in the faultable bpf_get_stack() and bpf_get_task_stack() helper prototypes when resolving user-space build IDs from a non-sleepable context. A local user can invoke a faultable stack helper from a non-sleepable kernel context to cause a denial of service.
The task-stack helper can be invoked from a non-sleepable timer callback in a sleepable program.
Affected software
Linux kernel
How to mitigate CVE-2026-98045
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3