{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "fc958a61ff6d34a0ec42744d3ff524ee202b2e9f"
            },
            {
              "fixed": "689a2ea75434131d0af58aeb7d51fde40e858b4d"
            },
            {
              "fixed": "009240d057e26831cc925feaba4c490209c1d0ba"
            },
            {
              "fixed": "d328175045176f85c15c369bd21dc551351e7935"
            },
            {
              "fixed": "832069bec79cf6f903441c5769d3cdba95d0af33"
            },
            {
              "fixed": "96ad57d31763559d376416cdf3bf5ae79bbbebec"
            },
            {
              "fixed": "76963b04b2d1c648d69949d8dd521e1ff7f40b51"
            },
            {
              "fixed": "1b46fe9dc8f8de59310f37e6c5e5c0e05ded46c3"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.15.0"
            },
            {
              "fixed": "5.15.216"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.183"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.151"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.103"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.44"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.8"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74546.json"
  },
  "details": "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.",
  "id": "CVE-2026-74546",
  "modified": "2026-08-21T03:30:25.840098451Z",
  "published": "2026-08-15T12:27:55.147Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/009240d057e26831cc925feaba4c490209c1d0ba"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1b46fe9dc8f8de59310f37e6c5e5c0e05ded46c3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/689a2ea75434131d0af58aeb7d51fde40e858b4d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/76963b04b2d1c648d69949d8dd521e1ff7f40b51"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/832069bec79cf6f903441c5769d3cdba95d0af33"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/96ad57d31763559d376416cdf3bf5ae79bbbebec"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d328175045176f85c15c369bd21dc551351e7935"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74546.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74546"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "hwmon: (adt7470) Fix divide-by-zero TOCTOU crash in fan speed read"
}