GHSA-J8P6-QX4R-877V

Vulnerability from github – Published: 2025-09-22 21:30 – Updated: 2025-11-03 18:31
VLAI?
Details

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.

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{
  "affected": [],
  "aliases": [
    "CVE-2025-39841"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-09-19T16:15:42Z",
    "severity": null
  },
  "details": "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": "GHSA-j8p6-qx4r-877v",
  "modified": "2025-11-03T18:31:41Z",
  "published": "2025-09-22T21:30:17Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-39841"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/367cb5ffd8a8a4c85dc89f55e7fa7cc191425b11"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/55658c7501467ca9ef3bd4453dd920010db8bc13"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/897f64b01c1249ac730329b83f4f40bab71e86c7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/95b63d15fce5c54a73bbf195e1aacb5a75b128e2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9dba9a45c348e8460da97c450cddf70b2056deb3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ab34084f42ee06a9028d67c78feafb911d33d111"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/baa39f6ad79d372a6ce0aa639fbb2f1578479f57"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d96cc9a1b57725930c60b607423759d563b4d900"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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