Race condition in Linux kernel - CVE-2026-93255
Published: September 25, 2026
Vulnerability identifier: #VU152138
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-2026-93255
CWE-ID: CWE-362
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause false alerts.
The vulnerability exists due to a race condition in Btrfs extent buffer reference handling when metadata-read completion races with B-tree folio invalidation. A local user can trigger concurrent filesystem operations to cause false alerts.
Affected software
Linux kernel
How to mitigate CVE-2026-93255
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3