{"id":"CVE-2026-74546","summary":"hwmon: (adt7470) Fix divide-by-zero TOCTOU crash in fan speed read","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.","modified":"2026-08-21T03:30:25.840098451Z","published":"2026-08-15T12:27:55.147Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74546.json"},"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"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"fc958a61ff6d34a0ec42744d3ff524ee202b2e9f"},{"fixed":"689a2ea75434131d0af58aeb7d51fde40e858b4d"},{"fixed":"009240d057e26831cc925feaba4c490209c1d0ba"},{"fixed":"d328175045176f85c15c369bd21dc551351e7935"},{"fixed":"832069bec79cf6f903441c5769d3cdba95d0af33"},{"fixed":"96ad57d31763559d376416cdf3bf5ae79bbbebec"},{"fixed":"76963b04b2d1c648d69949d8dd521e1ff7f40b51"},{"fixed":"1b46fe9dc8f8de59310f37e6c5e5c0e05ded46c3"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74546.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","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"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74546.json"}}],"schema_version":"1.9.0"}