GHSA-QX92-XVVW-QQ6Q

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:

watchdog: unregister PM notifier on watchdog unregister

watchdog_register_device() registers wdd->pm_nb when WDOG_NO_PING_ON_SUSPEND is set, but watchdog_unregister_device() does not remove it. This leaves an embedded notifier block on the PM notifier chain after the watchdog device has been unregistered.

A later suspend/resume notification can then call watchdog_pm_notifier() with a stale watchdog_device pointer, or at minimum after wdd->wd_data has been cleared by watchdog_dev_unregister().

Unregister the PM notifier before tearing down the watchdog device.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-74329"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-15T06:22:33Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwatchdog: unregister PM notifier on watchdog unregister\n\nwatchdog_register_device() registers wdd-\u003epm_nb when\nWDOG_NO_PING_ON_SUSPEND is set, but watchdog_unregister_device() does not\nremove it. This leaves an embedded notifier block on the PM notifier chain\nafter the watchdog device has been unregistered.\n\nA later suspend/resume notification can then call watchdog_pm_notifier()\nwith a stale watchdog_device pointer, or at minimum after wdd-\u003ewd_data has\nbeen cleared by watchdog_dev_unregister().\n\nUnregister the PM notifier before tearing down the watchdog device.",
  "id": "GHSA-qx92-xvvw-qq6q",
  "modified": "2026-08-15T06:32:30Z",
  "published": "2026-08-15T06:32:30Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74329"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/298821692d447c2f7b1bc9ef41cd88a31bf56436"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5d9b58ec6f5de5e159a570d419b1b08b3b9f854b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/89184909634e50d086d86d8a0c03fc86fe8d889f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a298c7302ee9584a7a1ac1e8acbede8d98ab51a4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c70b5bb6f04f77ef90e047d7edc2f476e206909f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cd2d1b1f99308f7680d75a377daaff363f1cc736"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e690afea5c876a4abfa2978c6a664460ed7d1217"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}



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