{"api_version":"1","generated_at":"2026-08-16T21:43:26+00:00","cve":"CVE-2026-74546","urls":{"html":"https://cve.report/CVE-2026-74546","api":"https://cve.report/api/cve/CVE-2026-74546.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-74546","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-74546"},"summary":{"title":"hwmon: (adt7470) Fix divide-by-zero TOCTOU crash in fan speed read","description":"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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-15 13:17:59","updated_at":"2026-08-15 13:17:59"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/96ad57d31763559d376416cdf3bf5ae79bbbebec","name":"https://git.kernel.org/stable/c/96ad57d31763559d376416cdf3bf5ae79bbbebec","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d328175045176f85c15c369bd21dc551351e7935","name":"https://git.kernel.org/stable/c/d328175045176f85c15c369bd21dc551351e7935","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/76963b04b2d1c648d69949d8dd521e1ff7f40b51","name":"https://git.kernel.org/stable/c/76963b04b2d1c648d69949d8dd521e1ff7f40b51","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/832069bec79cf6f903441c5769d3cdba95d0af33","name":"https://git.kernel.org/stable/c/832069bec79cf6f903441c5769d3cdba95d0af33","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/1b46fe9dc8f8de59310f37e6c5e5c0e05ded46c3","name":"https://git.kernel.org/stable/c/1b46fe9dc8f8de59310f37e6c5e5c0e05ded46c3","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-74546","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74546","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected fc958a61ff6d34a0ec42744d3ff524ee202b2e9f d328175045176f85c15c369bd21dc551351e7935 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected fc958a61ff6d34a0ec42744d3ff524ee202b2e9f 832069bec79cf6f903441c5769d3cdba95d0af33 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected fc958a61ff6d34a0ec42744d3ff524ee202b2e9f 96ad57d31763559d376416cdf3bf5ae79bbbebec git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected fc958a61ff6d34a0ec42744d3ff524ee202b2e9f 76963b04b2d1c648d69949d8dd521e1ff7f40b51 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected fc958a61ff6d34a0ec42744d3ff524ee202b2e9f 1b46fe9dc8f8de59310f37e6c5e5c0e05ded46c3 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.15","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.151 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.103 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.44 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.8 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2-rc6 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/hwmon/adt7470.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"d328175045176f85c15c369bd21dc551351e7935","status":"affected","version":"fc958a61ff6d34a0ec42744d3ff524ee202b2e9f","versionType":"git"},{"lessThan":"832069bec79cf6f903441c5769d3cdba95d0af33","status":"affected","version":"fc958a61ff6d34a0ec42744d3ff524ee202b2e9f","versionType":"git"},{"lessThan":"96ad57d31763559d376416cdf3bf5ae79bbbebec","status":"affected","version":"fc958a61ff6d34a0ec42744d3ff524ee202b2e9f","versionType":"git"},{"lessThan":"76963b04b2d1c648d69949d8dd521e1ff7f40b51","status":"affected","version":"fc958a61ff6d34a0ec42744d3ff524ee202b2e9f","versionType":"git"},{"lessThan":"1b46fe9dc8f8de59310f37e6c5e5c0e05ded46c3","status":"affected","version":"fc958a61ff6d34a0ec42744d3ff524ee202b2e9f","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/hwmon/adt7470.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.15"},{"lessThan":"5.15","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.151","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.103","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.44","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.8","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2-rc6","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.151","versionStartIncluding":"5.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.103","versionStartIncluding":"5.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.44","versionStartIncluding":"5.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.8","versionStartIncluding":"5.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2-rc6","versionStartIncluding":"5.15","vulnerable":true}],"negate":false,"operator":"OR"}]}],"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."}],"providerMetadata":{"dateUpdated":"2026-08-15T12:27:55.147Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/d328175045176f85c15c369bd21dc551351e7935"},{"url":"https://git.kernel.org/stable/c/832069bec79cf6f903441c5769d3cdba95d0af33"},{"url":"https://git.kernel.org/stable/c/96ad57d31763559d376416cdf3bf5ae79bbbebec"},{"url":"https://git.kernel.org/stable/c/76963b04b2d1c648d69949d8dd521e1ff7f40b51"},{"url":"https://git.kernel.org/stable/c/1b46fe9dc8f8de59310f37e6c5e5c0e05ded46c3"}],"title":"hwmon: (adt7470) Fix divide-by-zero TOCTOU crash in fan speed read","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-74546","datePublished":"2026-08-15T12:27:55.147Z","dateReserved":"2026-08-15T05:44:03.914Z","dateUpdated":"2026-08-15T12:27:55.147Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-15 13:17:59","lastModifiedDate":"2026-08-15 13:17:59","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"74546","Ordinal":"1","Title":"hwmon: (adt7470) Fix divide-by-zero TOCTOU crash in fan speed re","CVE":"CVE-2026-74546","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"74546","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"hwmon: (adt7470) Fix divide-by-zero TOCTOU crash in fan speed re"}]}}}