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GHSA-G6G3-325W-FC52

Vulnerability from github – Published: 2026-08-15 06:32 – Updated: 2026-08-15 06:32
VLAI
Details

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

raid1: fix nr_pending leak in REQ_ATOMIC bad-block error path

In raid1_write_request(), each per-mirror loop iteration begins by incrementing rdev->nr_pending. If a REQ_ATOMIC write encounters a badblock within the requested range, the code jumps to err_handle without dropping the reference taken for the current mirror.

err_handle's cleanup loop will only decrements for k < i and r1_bio->bios[k] is non-NULL. The current slot is therefore skipped, leaving its nr_pending reference leaked permanently. The reference prevents the rdev from ever being removed, since raid1_remove_conf() refuses to remove an rdev with nr_pending > 0.

Fix this by calling rdev_dec_pending() before jumping to err_handle.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-74372"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-15T06:22:38Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nraid1: fix nr_pending leak in REQ_ATOMIC bad-block error path\n\nIn raid1_write_request(), each per-mirror loop iteration begins by\nincrementing rdev-\u003enr_pending. If a REQ_ATOMIC write encounters a\nbadblock within the requested range, the code jumps to err_handle\nwithout dropping the reference taken for the current mirror.\n\nerr_handle\u0027s cleanup loop will only decrements for k \u003c i and\nr1_bio-\u003ebios[k] is non-NULL. The current slot is therefore skipped,\nleaving its nr_pending reference leaked permanently. The reference\nprevents the rdev from ever being removed, since raid1_remove_conf()\nrefuses to remove an rdev with nr_pending \u003e 0.\n\nFix this by calling rdev_dec_pending() before jumping to err_handle.",
  "id": "GHSA-g6g3-325w-fc52",
  "modified": "2026-08-15T06:32:31Z",
  "published": "2026-08-15T06:32:31Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74372"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5ac9e793ba2583d72740d929e7858a6c82e22ed5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/731485617bf862f1289c3f40ed1f800d0475826f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/909d9dc3b5730c8ed7b764c68bc788342df2a07b"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}



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