CVE-2026-74546 is a vulnerability in Linux Kernel
Published on August 15, 2026
hwmon: (adt7470) Fix divide-by-zero TOCTOU crash in fan speed read
In 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.
Products Associated with CVE-2026-74546
Want to know whenever a new CVE is published for Linux Kernel? stack.watch will email you.
Affected Versions
Linux:- Version fc958a61ff6d34a0ec42744d3ff524ee202b2e9f and below d328175045176f85c15c369bd21dc551351e7935 is affected.
- Version fc958a61ff6d34a0ec42744d3ff524ee202b2e9f and below 832069bec79cf6f903441c5769d3cdba95d0af33 is affected.
- Version fc958a61ff6d34a0ec42744d3ff524ee202b2e9f and below 96ad57d31763559d376416cdf3bf5ae79bbbebec is affected.
- Version fc958a61ff6d34a0ec42744d3ff524ee202b2e9f and below 76963b04b2d1c648d69949d8dd521e1ff7f40b51 is affected.
- Version fc958a61ff6d34a0ec42744d3ff524ee202b2e9f and below 1b46fe9dc8f8de59310f37e6c5e5c0e05ded46c3 is affected.
- Version 5.15 is affected.
- Before 5.15 is unaffected.
- Version 6.6.151, <= 6.6.* is unaffected.
- Version 6.12.103, <= 6.12.* is unaffected.
- Version 6.18.44, <= 6.18.* is unaffected.
- Version 7.1.8, <= 7.1.* is unaffected.
- Version 7.2-rc6, <= * is unaffected.