GHSA-R6PF-7WX9-37HW

Vulnerability from github – Published: 2026-08-22 18:30 – Updated: 2026-08-22 18:30
VLAI
Details

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

enic: fix tx_hang_reset use-after-free on device removal

enic_remove() cancels the reset and change_mtu_work items but does not cancel tx_hang_reset. A TX timeout that fires while the device is being removed can schedule enic_tx_hang_reset() so that it runs after free_netdev(), resulting in a use-after-free.

cancel_work_sync() alone is not sufficient here: the still-live watchdog and notify paths can re-schedule these work items in the window between the cancel and unregister_netdev(). Use disable_work_sync(), which cancels the work and blocks any subsequent schedule_work() from requeuing it, and apply it to the reset and change_mtu_work items as well so the same requeue race is closed for all teardown work.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-74725"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-22T16:16:47Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nenic: fix tx_hang_reset use-after-free on device removal\n\nenic_remove() cancels the reset and change_mtu_work items but does not\ncancel tx_hang_reset. A TX timeout that fires while the device is being\nremoved can schedule enic_tx_hang_reset() so that it runs after\nfree_netdev(), resulting in a use-after-free.\n\ncancel_work_sync() alone is not sufficient here: the still-live watchdog\nand notify paths can re-schedule these work items in the window between\nthe cancel and unregister_netdev(). Use disable_work_sync(), which\ncancels the work and blocks any subsequent schedule_work() from\nrequeuing it, and apply it to the reset and change_mtu_work items as\nwell so the same requeue race is closed for all teardown work.",
  "id": "GHSA-r6pf-7wx9-37hw",
  "modified": "2026-08-22T18:30:30Z",
  "published": "2026-08-22T18:30:30Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74725"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4f3464fc6c1f26afc504fd525c574f2bc14c9d42"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8619865f34fb3b130b567855382a5c4aadd522b9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e506e704b74748ffd0e1c92a7453ca2a959f832b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ec680ea4ba1bca92a767fb7e7869758bfdd886e3"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}



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