FKIE_CVE-2026-68356

Vulnerability from fkie_nvd - Published: 2026-08-10 13:20 - Updated: 2026-08-17 06:17
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: watchdog: airoha: Prevent division by zero when clock frequency is zero clk_get_rate() can return 0 when the clock provider is not properly configured or the clock is unmanaged. The driver uses wdt_freq as a divisor directly in airoha_wdt_probe() to compute max_timeout and in airoha_wdt_get_timeleft() to compute the remaining time, which results in a division by zero. Add a check for wdt_freq == 0 in probe and return -EINVAL with dev_err_probe() to prevent the division by zero and provide a diagnostic message.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/57c3f5bd5be008cd5b4ff6a45b7cb90f5ca45a37
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8681e5addf7171602616e256a09057697dcc75ca
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bcfcd7619f277842430d197556463b401b839ee9
Impacted products
Vendor Product Version
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{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/watchdog/airoha_wdt.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "8681e5addf7171602616e256a09057697dcc75ca",
              "status": "affected",
              "version": "3cf67f3769b8227ca75ca7102180a2e270ee01aa",
              "versionType": "git"
            },
            {
              "lessThan": "57c3f5bd5be008cd5b4ff6a45b7cb90f5ca45a37",
              "status": "affected",
              "version": "3cf67f3769b8227ca75ca7102180a2e270ee01aa",
              "versionType": "git"
            },
            {
              "lessThan": "bcfcd7619f277842430d197556463b401b839ee9",
              "status": "affected",
              "version": "3cf67f3769b8227ca75ca7102180a2e270ee01aa",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/watchdog/airoha_wdt.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.13"
            },
            {
              "lessThan": "6.13",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.42",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.6",
              "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: airoha: Prevent division by zero when clock frequency is zero\n\nclk_get_rate() can return 0 when the clock provider is not properly\nconfigured or the clock is unmanaged. The driver uses wdt_freq as a\ndivisor directly in airoha_wdt_probe() to compute max_timeout and in\nairoha_wdt_get_timeleft() to compute the remaining time, which results\nin a division by zero.\n\nAdd a check for wdt_freq == 0 in probe and return -EINVAL with\ndev_err_probe() to prevent the division by zero and provide a\ndiagnostic message."
    }
  ],
  "id": "CVE-2026-68356",
  "lastModified": "2026-08-17T06:17:43.890",
  "metrics": {},
  "published": "2026-08-10T13:20:28.050",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/57c3f5bd5be008cd5b4ff6a45b7cb90f5ca45a37"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/8681e5addf7171602616e256a09057697dcc75ca"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/bcfcd7619f277842430d197556463b401b839ee9"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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