CVE-2026-45955

Full vulnerability record from the local CVENow database.

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.

Severity

HIGH

CVSS score

7.1 (v3.1)

Vulnerability status

Modified

Source identifier

416baaa9-dc9f-4396-8d5f-8c081fb06d67

Published

2026-05-27 14:17:12.050000

Last modified

2026-10-19 20:18:22.293000

View original CVE JSON

{
  "id": "CVE-2026-45955",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2026-05-27T14:17:12.050",
  "lastModified": "2026-10-19T20:18:22.293",
  "vulnStatus": "Modified",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmd/md-llbitmap: fix percpu_ref not resurrected on suspend timeout\n\nWhen llbitmap_suspend_timeout() times out waiting for percpu_ref to\nbecome zero, it returns -ETIMEDOUT without resurrecting the percpu_ref.\nThe caller (md_llbitmap_daemon_fn) then continues to the next page\nwithout calling llbitmap_resume(), leaving the percpu_ref in a killed\nstate permanently.\n\nFix this by resurrecting the percpu_ref before returning the error,\nensuring the page control structure remains usable for subsequent\noperations."
    }
  ],
  "affected": [
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      "affectedData": [
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          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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          "baseScore": 7.1,
          "baseSeverity": "HIGH",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
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          "role": "CISA Coordinator",
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  "weaknesses": [
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