Race condition in Linux kernel - CVE-2026-45942
Published: May 28, 2026
Vulnerability identifier: #VU132547
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-45942
CWE-ID: CWE-362
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 a race condition in ext4 buddy bitmap handling when processing mixed huge-page workloads and concurrent page migration. A local user can trigger filesystem activity that hits the race window to cause a denial of service.
The issue can lead to ext4 e4b bitmap inconsistency reports and false-positive corruption reports during stress conditions.
How to mitigate CVE-2026-45942
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/29a07d691d282faf38c33d4b61839b89399110f9
- https://git.kernel.org/stable/c/57e83bfbe1e412ac42daced2086f3c6f9a17bba0
- https://git.kernel.org/stable/c/bdc56a9c46b2a99c12313122b9352b619a2e719e
- https://git.kernel.org/stable/c/c05033cfc5c7699cd4df8d48cef94d01da755f24
- https://git.kernel.org/stable/c/f29709a7a3fc38f5015d850504762cdef0e151f9