CVE-2026-74546 (GCVE-0-2026-74546)

Vulnerability from cvelistv5 – Published: 2026-08-15 12:27 – Updated: 2026-08-19 16:38
VLAI
Title
hwmon: (adt7470) Fix divide-by-zero TOCTOU crash in fan speed read
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.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: fc958a61ff6d34a0ec42744d3ff524ee202b2e9f , < 689a2ea75434131d0af58aeb7d51fde40e858b4d (git)
Affected: fc958a61ff6d34a0ec42744d3ff524ee202b2e9f , < 009240d057e26831cc925feaba4c490209c1d0ba (git)
Affected: fc958a61ff6d34a0ec42744d3ff524ee202b2e9f , < d328175045176f85c15c369bd21dc551351e7935 (git)
Affected: fc958a61ff6d34a0ec42744d3ff524ee202b2e9f , < 832069bec79cf6f903441c5769d3cdba95d0af33 (git)
Affected: fc958a61ff6d34a0ec42744d3ff524ee202b2e9f , < 96ad57d31763559d376416cdf3bf5ae79bbbebec (git)
Affected: fc958a61ff6d34a0ec42744d3ff524ee202b2e9f , < 76963b04b2d1c648d69949d8dd521e1ff7f40b51 (git)
Affected: fc958a61ff6d34a0ec42744d3ff524ee202b2e9f , < 1b46fe9dc8f8de59310f37e6c5e5c0e05ded46c3 (git)
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Linux Linux Affected: 5.15
Unaffected: 0 , < 5.15 (semver)
Unaffected: 5.15.216 , ≤ 5.15.* (semver)
Unaffected: 6.1.183 , ≤ 6.1.* (semver)
Unaffected: 6.6.151 , ≤ 6.6.* (semver)
Unaffected: 6.12.103 , ≤ 6.12.* (semver)
Unaffected: 6.18.44 , ≤ 6.18.* (semver)
Unaffected: 7.1.8 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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