GHSA-H6WJ-6663-2GVH

Vulnerability from github – Published: 2026-03-25 12:30 – Updated: 2026-05-22 00:31
VLAI
Details

In the Linux kernel, the following vulnerability has been resolved:

drbd: fix null-pointer dereference on local read error

In drbd_request_endio(), READ_COMPLETED_WITH_ERROR is passed to __req_mod() with a NULL peer_device:

__req_mod(req, what, NULL, &m);

The READ_COMPLETED_WITH_ERROR handler then unconditionally passes this NULL peer_device to drbd_set_out_of_sync(), which dereferences it, causing a null-pointer dereference.

Fix this by obtaining the peer_device via first_peer_device(device), matching how drbd_req_destroy() handles the same situation.

Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2026-23285"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-03-25T11:16:23Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrbd: fix null-pointer dereference on local read error\n\nIn drbd_request_endio(), READ_COMPLETED_WITH_ERROR is passed to\n__req_mod() with a NULL peer_device:\n\n  __req_mod(req, what, NULL, \u0026m);\n\nThe READ_COMPLETED_WITH_ERROR handler then unconditionally passes this\nNULL peer_device to drbd_set_out_of_sync(), which dereferences it,\ncausing a null-pointer dereference.\n\nFix this by obtaining the peer_device via first_peer_device(device),\nmatching how drbd_req_destroy() handles the same situation.",
  "id": "GHSA-h6wj-6663-2gvh",
  "modified": "2026-05-22T00:31:15Z",
  "published": "2026-03-25T12:30:21Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23285"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0d195d3b205ca90db30d70d09d7bb6909aac178f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1e906c08594c8f9a6a524f38ede2c4e051196106"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4e8935053ba389ae8d6685c10854d8021931bd89"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6f1d1614f841d91a4169db65812ffd1271735b42"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/91df51d2df0ca4fd3281f73626341563d64a98a5"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}



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