FKIE_CVE-2026-97969

Vulnerability from fkie_nvd - Published: 2026-09-25 11:17 - Updated: 2026-09-25 11:17
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: watchdog: msc313e: Fix clock leak and spurious timer in settimeout() msc313e_wdt_settimeout() unconditionally calls msc313e_wdt_start() which introduces two severe bugs: 1. If the watchdog is already active, calling start() again will increase the reference count of the clock again. However stop() is only called once, the reference count is unbalance. 2. If the watchdog is stopped, calling settimeout() will start the hardware timer accidentally. Factor out the register-writing logic into a helper function. Only call it in settimeout() if the watchdog is running. Otherwise, simply update `wdev->timeout`.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2152a13ee2a9af09a668ebd053a8dbf771dadb80
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2abf99a57b0b71b2b97745981f4039370ab78044
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3db30f315935c2fb0d95f46b7a593b5b4d3ec3d0
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/faf1eb2895c87a8c0fb920439dddc7e0d97c6a69
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/watchdog/msc313e_wdt.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "2152a13ee2a9af09a668ebd053a8dbf771dadb80",
              "status": "affected",
              "version": "e9800b7994642a794afd4894f072541c14277ce8",
              "versionType": "git"
            },
            {
              "lessThan": "2abf99a57b0b71b2b97745981f4039370ab78044",
              "status": "affected",
              "version": "e9800b7994642a794afd4894f072541c14277ce8",
              "versionType": "git"
            },
            {
              "lessThan": "faf1eb2895c87a8c0fb920439dddc7e0d97c6a69",
              "status": "affected",
              "version": "e9800b7994642a794afd4894f072541c14277ce8",
              "versionType": "git"
            },
            {
              "lessThan": "3db30f315935c2fb0d95f46b7a593b5b4d3ec3d0",
              "status": "affected",
              "version": "e9800b7994642a794afd4894f072541c14277ce8",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/watchdog/msc313e_wdt.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.14"
            },
            {
              "lessThan": "5.14",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.111",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.53",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc3",
              "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: msc313e: Fix clock leak and spurious timer in settimeout()\n\nmsc313e_wdt_settimeout() unconditionally calls msc313e_wdt_start() which\nintroduces two severe bugs:\n\n1. If the watchdog is already active, calling start() again will\n   increase the reference count of the clock again.  However stop() is\n   only called once, the reference count is unbalance.\n2. If the watchdog is stopped, calling settimeout() will start\n   the hardware timer accidentally.\n\nFactor out the register-writing logic into a helper function.  Only call\nit in settimeout() if the watchdog is running.  Otherwise, simply update\n`wdev-\u003etimeout`."
    }
  ],
  "id": "CVE-2026-97969",
  "lastModified": "2026-09-25T11:17:24.767",
  "metrics": {},
  "published": "2026-09-25T11:17:24.767",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/2152a13ee2a9af09a668ebd053a8dbf771dadb80"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/2abf99a57b0b71b2b97745981f4039370ab78044"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3db30f315935c2fb0d95f46b7a593b5b4d3ec3d0"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/faf1eb2895c87a8c0fb920439dddc7e0d97c6a69"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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