Riskcovery

CVE-2026-74546

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

State
Published
Severity
Not scored
Published
Aug 15, 2026
Updated
Aug 19, 2026
Reserved
Aug 15, 2026

Read the record on cve.org

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • fc958a61ff6d34a0ec42744d3ff524ee202b2e9f to before 689a2ea75434131d0af58aeb7d51fde40e858b4dAffected
  • fc958a61ff6d34a0ec42744d3ff524ee202b2e9f to before 009240d057e26831cc925feaba4c490209c1d0baAffected
  • fc958a61ff6d34a0ec42744d3ff524ee202b2e9f to before d328175045176f85c15c369bd21dc551351e7935Affected
  • fc958a61ff6d34a0ec42744d3ff524ee202b2e9f to before 832069bec79cf6f903441c5769d3cdba95d0af33Affected
  • fc958a61ff6d34a0ec42744d3ff524ee202b2e9f to before 96ad57d31763559d376416cdf3bf5ae79bbbebecAffected
  • fc958a61ff6d34a0ec42744d3ff524ee202b2e9f to before 76963b04b2d1c648d69949d8dd521e1ff7f40b51Affected
  • fc958a61ff6d34a0ec42744d3ff524ee202b2e9f to before 1b46fe9dc8f8de59310f37e6c5e5c0e05ded46c3Affected
LinuxLinux
  • 5.15Affected
  • before 5.15Not affected
  • 5.15.216 through 5.15.*Not affected
  • 6.1.183 through 6.1.*Not affected
  • 6.6.151 through 6.6.*Not affected
  • 6.12.103 through 6.12.*Not affected
  • 6.18.44 through 6.18.*Not affected
  • 7.1.8 through 7.1.*Not affected
  • 7.2 and laterNot affected

References

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