CVEvulnerability
CVE-2026-74546
- Status
- Received
- Published
- 2026-08-15
- Last modified
- 2026-08-19
- Assigner
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Description
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.
References
- https://git.kernel.org/stable/c/009240d057e26831cc925feaba4c490209c1d0ba git.kernel.org
- https://git.kernel.org/stable/c/1b46fe9dc8f8de59310f37e6c5e5c0e05ded46c3 git.kernel.org
- https://git.kernel.org/stable/c/689a2ea75434131d0af58aeb7d51fde40e858b4d git.kernel.org
- https://git.kernel.org/stable/c/76963b04b2d1c648d69949d8dd521e1ff7f40b51 git.kernel.org
- https://git.kernel.org/stable/c/832069bec79cf6f903441c5769d3cdba95d0af33 git.kernel.org
- https://git.kernel.org/stable/c/96ad57d31763559d376416cdf3bf5ae79bbbebec git.kernel.org
- https://git.kernel.org/stable/c/d328175045176f85c15c369bd21dc551351e7935 git.kernel.org