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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-74546
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-15 13:17:59 UTC
Updated2026-08-15 13:17:59 UTC
DescriptionIn 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.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected fc958a61ff6d34a0ec42744d3ff524ee202b2e9f d328175045176f85c15c369bd21dc551351e7935 git Not specified
CNA Linux Linux affected fc958a61ff6d34a0ec42744d3ff524ee202b2e9f 832069bec79cf6f903441c5769d3cdba95d0af33 git Not specified
CNA Linux Linux affected fc958a61ff6d34a0ec42744d3ff524ee202b2e9f 96ad57d31763559d376416cdf3bf5ae79bbbebec git Not specified
CNA Linux Linux affected fc958a61ff6d34a0ec42744d3ff524ee202b2e9f 76963b04b2d1c648d69949d8dd521e1ff7f40b51 git Not specified
CNA Linux Linux affected fc958a61ff6d34a0ec42744d3ff524ee202b2e9f 1b46fe9dc8f8de59310f37e6c5e5c0e05ded46c3 git Not specified
CNA Linux Linux affected 5.15 Not specified
CNA Linux Linux unaffected 5.15 semver Not specified
CNA Linux Linux unaffected 6.6.151 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.103 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.44 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.8 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2-rc6 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/96ad57d31763559d376416cdf3bf5ae79bbbebec 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/d328175045176f85c15c369bd21dc551351e7935 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/76963b04b2d1c648d69949d8dd521e1ff7f40b51 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/832069bec79cf6f903441c5769d3cdba95d0af33 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/1b46fe9dc8f8de59310f37e6c5e5c0e05ded46c3 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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