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CVE-2026-72394

Estado: RecibidaSin puntuar—

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

hwmon: (aspeed-g6-pwm-tach) Guard fan RPM calculation against divide-by-zero

Sashiko reports:

In the aspeed-g6-pwm-tacho driver, the aspeed_tach_val_to_rpm() function calculates the fan RPM using the tachometer value. However, it does not check if the tachometer value is zero before performing the division.

If the hardware reports a tachometer value of 0 (which can happen due to an extremely fast pulse, a stuck edge, or a hardware glitch), the calculated tach_div evaluates to 0. The subsequent call to do_div() with tach_div as the divisor triggers a divide-by-zero exception, leading to a kernel panic.

Leer descripción completaMostrar menos

Check the divisor against zero to fix the problem.

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)

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{
  "id": "CVE-2026-72394",
  "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": "7e1449cd15d1096157d1a9923b82e37602fb7eb0",
              "lessThan": "a3f98bd397398e2d4a7f98e006b5aaf4d54ebdf3",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "7e1449cd15d1096157d1a9923b82e37602fb7eb0",
              "lessThan": "898ca04b096b9e4640300eab91468c826a1ec92b",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "7e1449cd15d1096157d1a9923b82e37602fb7eb0",
              "lessThan": "fb8a5afe6f1f8aa7f19c6dda23d277dd6ae5d9e1",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "7e1449cd15d1096157d1a9923b82e37602fb7eb0",
              "lessThan": "fe87b8dc67f1b2c64e76a66e78468c533d3c44ca",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/hwmon/aspeed-g6-pwm-tach.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.9"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.9",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.12.97",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.40",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/hwmon/aspeed-g6-pwm-tach.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-08-15T06:22:12.943",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/898ca04b096b9e4640300eab91468c826a1ec92b",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/a3f98bd397398e2d4a7f98e006b5aaf4d54ebdf3",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/fb8a5afe6f1f8aa7f19c6dda23d277dd6ae5d9e1",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/fe87b8dc67f1b2c64e76a66e78468c533d3c44ca",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nhwmon: (aspeed-g6-pwm-tach) Guard fan RPM calculation against divide-by-zero\n\nSashiko reports:\n\nIn the aspeed-g6-pwm-tacho driver, the aspeed_tach_val_to_rpm() function\ncalculates the fan RPM using the tachometer value. However, it does not\ncheck if the tachometer value is zero before performing the division.\n\nIf the hardware reports a tachometer value of 0 (which can happen due to\nan extremely fast pulse, a stuck edge, or a hardware glitch), the\ncalculated tach_div evaluates to 0. The subsequent call to do_div() with\ntach_div as the divisor triggers a divide-by-zero exception, leading to\na kernel panic.\n\nCheck the divisor against zero to fix the problem."
    }
  ],
  "lastModified": "2026-08-17T06:19:05.913",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}