ghsa-j8p6-qx4r-877v
Vulnerability from github
Published
2025-09-22 21:30
Modified
2025-09-22 21:30
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.

Show details on source website

To clipboard 

{
  "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": "2025-09-22T21:30:17Z",
  "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"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.