Improper locking in Linux kernel - CVE-2026-43115
Published: May 7, 2026
Vulnerability identifier: #VU130642
CSH Severity: Low
CVSS v4.0: 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/E:U/U:Clear
CVE-ID: CVE-2026-43115
CWE-ID: CWE-667
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper locking in tiny SRCU when starting a grace period from call_srcu() while a scheduler lock is held. A local user can trigger call_srcu() in this state to cause a denial of service.
A use-after-free may also occur if queued irq_work executes after SRCU structure cleanup begins.
How to mitigate CVE-2026-43115
Install security update from vendor's repository.