CVE-2026-45955

HighCVSS 7.1/10Last modified Oct 19, 2026

Description

In the Linux kernel, the following vulnerability has been resolved:

md/md-llbitmap: fix percpu_ref not resurrected on suspend timeout

When llbitmap_suspend_timeout() times out waiting for percpu_ref to become zero, it returns -ETIMEDOUT without resurrecting the percpu_ref. The caller (md_llbitmap_daemon_fn) then continues to the next page without calling llbitmap_resume(), leaving the percpu_ref in a killed state permanently.

Fix this by resurrecting the percpu_ref before returning the error, ensuring the page control structure remains usable for subsequent operations.

Metrics

CVSS 3.1 7.1/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

Weakness enumeration

CWE-404

Affected software

VendorProductVersions
LinuxLinux>= 5ab829f1971dc99f2aac10846c378e67fc875abc, < 095417d6b669c2dec39a5842ccb94df915f97f54; >= 5ab829f1971dc99f2aac10846c378e67fc875abc, < 2446d099350185caeed19ab2c0270451a97296fb; >= 5ab829f1971dc99f2aac10846c378e67fc875abc, < d119bd2e1643cc023210ff3c6f0657e4f914e71d
LinuxLinux6.18

References

Timeline

Published
May 27, 2026
Last modified
Oct 19, 2026
NVD status
Modified

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CVE-2026-45955: High severity, CVSS 7.1 | Vulnix