CVE-2026-97969

Full vulnerability record from the local CVENow database.

Description

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`.

Severity

Not scored

CVSS score

Not available

Vulnerability status

Received

Source identifier

416baaa9-dc9f-4396-8d5f-8c081fb06d67

Published

2026-09-25 11:17:24.767000

Last modified

2026-10-19 10:17:48.263000

View original CVE JSON

{
  "id": "CVE-2026-97969",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2026-09-25T11:17:24.767",
  "lastModified": "2026-10-19T10:17:48.263",
  "vulnStatus": "Received",
  "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->timeout`."
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "drivers/watchdog/msc313e_wdt.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "e9800b7994642a794afd4894f072541c14277ce8",
              "lessThan": "68665016c7b777b44e27b6b0c1e6524c28ebe40a",
              "versionType": "git",
              "status": "affected"
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            {
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              "lessThan": "77ef2aa8b46876ca9935f32dd874c517ccf5d880",
              "versionType": "git",
              "status": "affected"
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        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "drivers/watchdog/msc313e_wdt.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
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              "version": "5.14",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "5.14",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "5.15.222",
              "lessThanOrEqual": "5.15.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.1.189",
              "lessThanOrEqual": "6.1.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.6.158",
              "lessThanOrEqual": "6.6.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.12.111",
              "lessThanOrEqual": "6.12.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.18.53",
              "lessThanOrEqual": "6.18.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.2.7",
              "lessThanOrEqual": "7.2.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.3",
              "lessThanOrEqual": "*",
              "versionType": "original_commit_for_fix",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {},
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/2152a13ee2a9af09a668ebd053a8dbf771dadb80",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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    },
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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}