CVE-2026-97969 (GCVE-0-2026-97969)
Vulnerability from cvelistv5
Published
2026-09-25 10:23
Modified
2026-10-19 09:11
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
Impacted products
Vendor Product Version
Linux Linux Version: e9800b7994642a794afd4894f072541c14277ce8
Version: e9800b7994642a794afd4894f072541c14277ce8
Version: e9800b7994642a794afd4894f072541c14277ce8
Version: e9800b7994642a794afd4894f072541c14277ce8
Version: e9800b7994642a794afd4894f072541c14277ce8
Version: e9800b7994642a794afd4894f072541c14277ce8
Version: e9800b7994642a794afd4894f072541c14277ce8
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "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": "68665016c7b777b44e27b6b0c1e6524c28ebe40a",
              "status": "affected",
              "version": "e9800b7994642a794afd4894f072541c14277ce8",
              "versionType": "git"
            },
            {
              "lessThan": "77ef2aa8b46876ca9935f32dd874c517ccf5d880",
              "status": "affected",
              "version": "e9800b7994642a794afd4894f072541c14277ce8",
              "versionType": "git"
            },
            {
              "lessThan": "a1dd0817776ea2a870ba2347001af13ddd4cb321",
              "status": "affected",
              "version": "e9800b7994642a794afd4894f072541c14277ce8",
              "versionType": "git"
            },
            {
              "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": "5.15.*",
              "status": "unaffected",
              "version": "5.15.222",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.189",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.158",
              "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",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.222",
                  "versionStartIncluding": "5.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.189",
                  "versionStartIncluding": "5.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.158",
                  "versionStartIncluding": "5.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.111",
                  "versionStartIncluding": "5.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.53",
                  "versionStartIncluding": "5.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.7",
                  "versionStartIncluding": "5.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3",
                  "versionStartIncluding": "5.14",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "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`."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T09:11:35.081Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/68665016c7b777b44e27b6b0c1e6524c28ebe40a"
        },
        {
          "url": "https://git.kernel.org/stable/c/77ef2aa8b46876ca9935f32dd874c517ccf5d880"
        },
        {
          "url": "https://git.kernel.org/stable/c/a1dd0817776ea2a870ba2347001af13ddd4cb321"
        },
        {
          "url": "https://git.kernel.org/stable/c/2152a13ee2a9af09a668ebd053a8dbf771dadb80"
        },
        {
          "url": "https://git.kernel.org/stable/c/2abf99a57b0b71b2b97745981f4039370ab78044"
        },
        {
          "url": "https://git.kernel.org/stable/c/faf1eb2895c87a8c0fb920439dddc7e0d97c6a69"
        },
        {
          "url": "https://git.kernel.org/stable/c/3db30f315935c2fb0d95f46b7a593b5b4d3ec3d0"
        }
      ],
      "title": "watchdog: msc313e: Fix clock leak and spurious timer in settimeout()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-97969",
    "datePublished": "2026-09-25T10:23:10.333Z",
    "dateReserved": "2026-09-25T10:18:58.207Z",
    "dateUpdated": "2026-10-19T09:11:35.081Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.