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CVE-2026-74546

Estado: RecibidaSin puntuar—

In the Linux kernel, the following vulnerability has been resolved:

hwmon: (adt7470) Fix divide-by-zero TOCTOU crash in fan speed read

If the fan data becomes 0 between the FAN_DATA_VALID() check and the FAN_PERIOD_TO_RPM() conversion, it will result in a divide-by-zero crash due to a race with a concurrent update of the cached fan value.

Fix a TOCTOU issue by reading fan data once.

CVSS

NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Linux — Linux KernelAI

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2026-74546",
  "cveTags": [],
  "metrics": {},
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "fc958a61ff6d34a0ec42744d3ff524ee202b2e9f",
              "lessThan": "689a2ea75434131d0af58aeb7d51fde40e858b4d",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "fc958a61ff6d34a0ec42744d3ff524ee202b2e9f",
              "lessThan": "009240d057e26831cc925feaba4c490209c1d0ba",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "fc958a61ff6d34a0ec42744d3ff524ee202b2e9f",
              "lessThan": "d328175045176f85c15c369bd21dc551351e7935",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "fc958a61ff6d34a0ec42744d3ff524ee202b2e9f",
              "lessThan": "832069bec79cf6f903441c5769d3cdba95d0af33",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "fc958a61ff6d34a0ec42744d3ff524ee202b2e9f",
              "lessThan": "96ad57d31763559d376416cdf3bf5ae79bbbebec",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "fc958a61ff6d34a0ec42744d3ff524ee202b2e9f",
              "lessThan": "76963b04b2d1c648d69949d8dd521e1ff7f40b51",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "fc958a61ff6d34a0ec42744d3ff524ee202b2e9f",
              "lessThan": "1b46fe9dc8f8de59310f37e6c5e5c0e05ded46c3",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/hwmon/adt7470.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.15"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "5.15",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "5.15.216",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "status": "unaffected",
              "version": "6.1.183",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.6.151",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.103",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.44",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.1.8",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/hwmon/adt7470.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-08-15T13:17:59.950",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/009240d057e26831cc925feaba4c490209c1d0ba",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/1b46fe9dc8f8de59310f37e6c5e5c0e05ded46c3",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/689a2ea75434131d0af58aeb7d51fde40e858b4d",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/76963b04b2d1c648d69949d8dd521e1ff7f40b51",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/832069bec79cf6f903441c5769d3cdba95d0af33",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/96ad57d31763559d376416cdf3bf5ae79bbbebec",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/d328175045176f85c15c369bd21dc551351e7935",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nhwmon: (adt7470) Fix divide-by-zero TOCTOU crash in fan speed read\n\nIf the fan data becomes 0 between the FAN_DATA_VALID() check and the\nFAN_PERIOD_TO_RPM() conversion, it will result in a divide-by-zero crash\ndue to a race with a concurrent update of the cached fan value.\n\nFix a TOCTOU issue by reading fan data once."
    }
  ],
  "lastModified": "2026-08-19T17:21:09.453",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}