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CVE-2026-74546NVD
Vulnerability Summary
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.
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.
External References
- https://git.kernel.org/stable/c/009240d057e26831cc925feaba4c490209c1d0ba
- https://git.kernel.org/stable/c/1b46fe9dc8f8de59310f37e6c5e5c0e05ded46c3
- https://git.kernel.org/stable/c/689a2ea75434131d0af58aeb7d51fde40e858b4d
- https://git.kernel.org/stable/c/76963b04b2d1c648d69949d8dd521e1ff7f40b51
- https://git.kernel.org/stable/c/832069bec79cf6f903441c5769d3cdba95d0af33
- https://git.kernel.org/stable/c/96ad57d31763559d376416cdf3bf5ae79bbbebec
- https://git.kernel.org/stable/c/d328175045176f85c15c369bd21dc551351e7935