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.

No CVSS v4.0

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Linux Linux unaffected
Version Status Constraints
fc958a61ff6d34a0ec42744d3ff524ee202b2e9f affected < d328175045176f85c15c369bd21dc551351e7935
fc958a61ff6d34a0ec42744d3ff524ee202b2e9f affected < 832069bec79cf6f903441c5769d3cdba95d0af33
fc958a61ff6d34a0ec42744d3ff524ee202b2e9f affected < 96ad57d31763559d376416cdf3bf5ae79bbbebec
fc958a61ff6d34a0ec42744d3ff524ee202b2e9f affected < 76963b04b2d1c648d69949d8dd521e1ff7f40b51
fc958a61ff6d34a0ec42744d3ff524ee202b2e9f affected < 1b46fe9dc8f8de59310f37e6c5e5c0e05ded46c3
Linux Linux affected
Version Status Constraints
5.15 affected —
0 unaffected < 5.15
6.6.151 unaffected ≤ 6.6.*
6.12.103 unaffected ≤ 6.12.*
6.18.44 unaffected ≤ 6.18.*
7.1.8 unaffected ≤ 7.1.*
7.2-rc6 unaffected ≤ *

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Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://git.kernel.org/stable/c/1b46fe9dc8f8de59310f37e6c5e5c0e05ded46c3 cve-icon cve-icon
https://git.kernel.org/stable/c/76963b04b2d1c648d69949d8dd521e1ff7f40b51 cve-icon cve-icon
https://git.kernel.org/stable/c/832069bec79cf6f903441c5769d3cdba95d0af33 cve-icon cve-icon
https://git.kernel.org/stable/c/96ad57d31763559d376416cdf3bf5ae79bbbebec cve-icon cve-icon
https://git.kernel.org/stable/c/d328175045176f85c15c369bd21dc551351e7935 cve-icon cve-icon
History

Sat, 15 Aug 2026 14:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-362
CWE-369

Sat, 15 Aug 2026 12:45:00 +0000

Type Values Removed Values Added
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.
Title hwmon: (adt7470) Fix divide-by-zero TOCTOU crash in fan speed read
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References

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cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-08-15T12:27:55.147Z

Reserved: 2026-08-15T05:44:03.914Z

Link: CVE-2026-74546

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-08-15T13:17:59.950

Modified: 2026-08-15T13:17:59.950

Link: CVE-2026-74546

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-15T14:30:10Z

Weaknesses