High 7.1Published May 27, 2026

CVE-2026-45955md/md-llbitmap: fix percpu_ref not resurrected on suspend timeout

Updated under an hour ago (2026-10-19 11:10 UTC)

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Exploited in the last 30 days

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.

CVSS: 7.1 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Analyzed
Record last updated: Oct 16, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 5ab829f1971dc99f2aac10846c378e67fc875abc before 095417d6b669c2dec39a5842ccb94df915f97f54; from 5ab829f1971dc99f2aac10846c378e67fc875abc before 2446d099350185caeed19ab2c0270451a97296fb; from 5ab829f1971dc99f2aac10846c378e67fc875abc before d119bd2e1643cc023210ff3c6f0657e4f914e71d	CNA record
linux linux_kernel linux:linux_kernel	from 6.18 before 6.18.14; from 6.19 before 6.19.4	NVD

References

https://git.kernel.org/stable/c/095417d6b669c2dec39a5842ccb94df915f97f54patch
https://git.kernel.org/stable/c/2446d099350185caeed19ab2c0270451a97296fbpatch
https://git.kernel.org/stable/c/d119bd2e1643cc023210ff3c6f0657e4f914e71dpatch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.