CVE-2026-74546

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

N/A

Published: August 15, 2026 at 12:27 PM UTC

Updated: August 19, 2026 at 05:21 PM UTC

1 product affected across 1 vendorLinux Kernel

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Severity

N/A

Exploit prediction

EPSS 0.2%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel · Linux

95%

5.15 ≤ v < 5.15.2165.15 ≤ v < 6.1.1835.15 ≤ v < 6.12.1035.15 ≤ v < 6.18.445.15 ≤ v < 6.6.1515.15 ≤ v < 7.1.85.15 ≤ v < 7.25.15fc958a61ff6d34a0ec42744d3ff524ee202b2e9f

Vendor states this is fixed in 009240d057e26831cc925feaba4c490209c1d0ba (fixed)

Vendor states this is fixed in 1b46fe9dc8f8de59310f37e6c5e5c0e05ded46c3 (fixed)

Vendor states this is fixed in 689a2ea75434131d0af58aeb7d51fde40e858b4d (fixed)

Vendor states this is fixed in 76963b04b2d1c648d69949d8dd521e1ff7f40b51 (fixed)

Vendor states this is fixed in 832069bec79cf6f903441c5769d3cdba95d0af33 (fixed)

Vendor states this is fixed in 96ad57d31763559d376416cdf3bf5ae79bbbebec (fixed)

Vendor states this is fixed in d328175045176f85c15c369bd21dc551351e7935 (fixed)

Vendor states this is fixed in 5.15 (unaffected)

Vendor states this is fixed in 5.15.216 (unaffected)

Vendor states this is fixed in 6.1.183 (unaffected)

Vendor states this is fixed in 6.12.103 (unaffected)

Vendor states this is fixed in 6.18.44 (unaffected)