{
  "cveId": "CVE-2024-49854",
  "url": "https://patchblox.com/security/cve/CVE-2024-49854",
  "summary": "CVE-2024-49854 is fixed in 27 products on 1 platform, first by DEBIAN-CVE-2024-49854, released October 21, 2024. It is not reported as exploited. Patch Radar priority: High.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  block, bfq: fix uaf for accessing waker_bfqq aft...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  block, bfq: fix uaf for accessing waker_bfqq after splitting  After commit 42c306ed7233 (\u0022block, bfq: don\u0027t break merge chain in bfq_split_bfqq()\u0022), if the current procress is the last holder of bfqq, the bfqq can be freed after bfq_split_bfqq(). Hence recored the bfqq and then access bfqq-\u003Ewaker_bfqq may trigger UAF. What\u0027s more, the waker_bfqq may in the merge chain of bfqq, hence just recored waker_bfqq is still not safe.  Fix the problem by adding a helper bfq_waker_bfqq() to check if bfqq-\u003Ewaker_bfqq is in the merge chain, and current procress is the only holder.",
  "published": "2024-10-21T13:15:06Z",
  "severity": "high",
  "cvss": 7.8,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.00215,
  "epssPercentile": 0.12004,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
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      "product": "dtb-aarch64",
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      "fix": "SUSE-SU-2025:0154-1",
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      "released": "2025-01-17T09:15:09Z"
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      "platform": "linux",
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      "fix": "SUSE-SU-2025:0154-1",
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      "fix": "SUSE-SU-2025:0117-1",
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      "released": "2025-01-15T09:07:49Z"
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      "released": "2025-01-15T09:07:49Z"
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      "fix": "SUSE-SU-2025:0289-1",
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      "released": "2025-01-29T16:11:29Z"
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      "fix": "SUSE-SU-2025:0289-1",
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      "released": "2025-01-29T16:11:29Z"
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      "fix": "SUSE-SU-2025:0154-1",
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      "fix": "SUSE-SU-2025:0154-1",
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  "noFixYet": [],
  "dataAsOf": "2026-11-09T01:18:40Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}