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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.

PUBLISHED Reserved 2026-05-13 | Published 2026-05-27 | Updated 2026-06-05 | Assigner Linux




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

Product status

Default status
unaffected

5ab829f1971dc99f2aac10846c378e67fc875abc (git) before 095417d6b669c2dec39a5842ccb94df915f97f54
affected

5ab829f1971dc99f2aac10846c378e67fc875abc (git) before 2446d099350185caeed19ab2c0270451a97296fb
affected

5ab829f1971dc99f2aac10846c378e67fc875abc (git) before d119bd2e1643cc023210ff3c6f0657e4f914e71d
affected

Default status
affected

6.18
affected

Any version before 6.18
unaffected

6.18.14 (semver)
unaffected

6.19.4 (semver)
unaffected

7.0 (original_commit_for_fix)
unaffected

References

git.kernel.org/...c/095417d6b669c2dec39a5842ccb94df915f97f54

git.kernel.org/...c/2446d099350185caeed19ab2c0270451a97296fb

git.kernel.org/...c/d119bd2e1643cc023210ff3c6f0657e4f914e71d

cve.org (CVE-2026-45955)

nvd.nist.gov (CVE-2026-45955)

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