fkie_cve-2025-39841
Vulnerability from fkie_nvd
Published
2025-09-19 16:15
Modified
2025-09-22 21:23
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: scsi: lpfc: Fix buffer free/clear order in deferred receive path Fix a use-after-free window by correcting the buffer release sequence in the deferred receive path. The code freed the RQ buffer first and only then cleared the context pointer under the lock. Concurrent paths (e.g., ABTS and the repost path) also inspect and release the same pointer under the lock, so the old order could lead to double-free/UAF. Note that the repost path already uses the correct pattern: detach the pointer under the lock, then free it after dropping the lock. The deferred path should do the same.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/367cb5ffd8a8a4c85dc89f55e7fa7cc191425b11
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/55658c7501467ca9ef3bd4453dd920010db8bc13
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/897f64b01c1249ac730329b83f4f40bab71e86c7
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/95b63d15fce5c54a73bbf195e1aacb5a75b128e2
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9dba9a45c348e8460da97c450cddf70b2056deb3
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ab34084f42ee06a9028d67c78feafb911d33d111
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/baa39f6ad79d372a6ce0aa639fbb2f1578479f57
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d96cc9a1b57725930c60b607423759d563b4d900
Impacted products
Vendor Product Version


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{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: lpfc: Fix buffer free/clear order in deferred receive path\n\nFix a use-after-free window by correcting the buffer release sequence in\nthe deferred receive path. The code freed the RQ buffer first and only\nthen cleared the context pointer under the lock. Concurrent paths (e.g.,\nABTS and the repost path) also inspect and release the same pointer under\nthe lock, so the old order could lead to double-free/UAF.\n\nNote that the repost path already uses the correct pattern: detach the\npointer under the lock, then free it after dropping the lock. The\ndeferred path should do the same."
    }
  ],
  "id": "CVE-2025-39841",
  "lastModified": "2025-09-22T21:23:01.543",
  "metrics": {},
  "published": "2025-09-19T16:15:42.813",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/367cb5ffd8a8a4c85dc89f55e7fa7cc191425b11"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/55658c7501467ca9ef3bd4453dd920010db8bc13"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/897f64b01c1249ac730329b83f4f40bab71e86c7"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/95b63d15fce5c54a73bbf195e1aacb5a75b128e2"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/9dba9a45c348e8460da97c450cddf70b2056deb3"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ab34084f42ee06a9028d67c78feafb911d33d111"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/baa39f6ad79d372a6ce0aa639fbb2f1578479f57"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d96cc9a1b57725930c60b607423759d563b4d900"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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