Use-after-free in Linux kernel - CVE-2026-90276
Published: September 18, 2026
Vulnerability identifier: #VU151202
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-2026-90276
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to trigger a use-after-free condition.
The vulnerability exists due to improper synchronization in the md llbitmap destruction path when daemon work rearms the pending timer during teardown. A local user can trigger llbitmap teardown while daemon work is queued or running to trigger a use-after-free condition.
Affected software
Linux kernel
How to mitigate CVE-2026-90276
Install security update from vendor's repository.