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FKIE_CVE-2026-74329

Vulnerability from fkie_nvd - Published: 2026-08-15 06:22 - Updated: 2026-08-17 06:19
Severity
Summary
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/298821692d447c2f7b1bc9ef41cd88a31bf56436
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5d9b58ec6f5de5e159a570d419b1b08b3b9f854b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/89184909634e50d086d86d8a0c03fc86fe8d889f
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a298c7302ee9584a7a1ac1e8acbede8d98ab51a4
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c70b5bb6f04f77ef90e047d7edc2f476e206909f
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/cd2d1b1f99308f7680d75a377daaff363f1cc736
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e690afea5c876a4abfa2978c6a664460ed7d1217
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/watchdog/watchdog_core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "cd2d1b1f99308f7680d75a377daaff363f1cc736",
              "status": "affected",
              "version": "60bcd91aafd22ef62cef9ae2037fa2e1d4da2fb3",
              "versionType": "git"
            },
            {
              "lessThan": "5d9b58ec6f5de5e159a570d419b1b08b3b9f854b",
              "status": "affected",
              "version": "60bcd91aafd22ef62cef9ae2037fa2e1d4da2fb3",
              "versionType": "git"
            },
            {
              "lessThan": "89184909634e50d086d86d8a0c03fc86fe8d889f",
              "status": "affected",
              "version": "60bcd91aafd22ef62cef9ae2037fa2e1d4da2fb3",
              "versionType": "git"
            },
            {
              "lessThan": "e690afea5c876a4abfa2978c6a664460ed7d1217",
              "status": "affected",
              "version": "60bcd91aafd22ef62cef9ae2037fa2e1d4da2fb3",
              "versionType": "git"
            },
            {
              "lessThan": "298821692d447c2f7b1bc9ef41cd88a31bf56436",
              "status": "affected",
              "version": "60bcd91aafd22ef62cef9ae2037fa2e1d4da2fb3",
              "versionType": "git"
            },
            {
              "lessThan": "c70b5bb6f04f77ef90e047d7edc2f476e206909f",
              "status": "affected",
              "version": "60bcd91aafd22ef62cef9ae2037fa2e1d4da2fb3",
              "versionType": "git"
            },
            {
              "lessThan": "a298c7302ee9584a7a1ac1e8acbede8d98ab51a4",
              "status": "affected",
              "version": "60bcd91aafd22ef62cef9ae2037fa2e1d4da2fb3",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/watchdog/watchdog_core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.15"
            },
            {
              "lessThan": "5.15",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.212",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.178",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.145",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.97",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.40",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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": "CVE-2026-74329",
  "lastModified": "2026-08-17T06:19:27.317",
  "metrics": {},
  "published": "2026-08-15T06:22:33.640",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/298821692d447c2f7b1bc9ef41cd88a31bf56436"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5d9b58ec6f5de5e159a570d419b1b08b3b9f854b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/89184909634e50d086d86d8a0c03fc86fe8d889f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a298c7302ee9584a7a1ac1e8acbede8d98ab51a4"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c70b5bb6f04f77ef90e047d7edc2f476e206909f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/cd2d1b1f99308f7680d75a377daaff363f1cc736"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e690afea5c876a4abfa2978c6a664460ed7d1217"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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