hwmon: (aspeed-g6-pwm-tach) Guard fan RPM calculation against divide-by-zero

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-72394
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-15 06:22:12 UTC
Updated2026-08-15 06:22:12 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: hwmon: (aspeed-g6-pwm-tach) Guard fan RPM calculation against divide-by-zero Sashiko reports: In the aspeed-g6-pwm-tacho driver, the aspeed_tach_val_to_rpm() function calculates the fan RPM using the tachometer value. However, it does not check if the tachometer value is zero before performing the division. If the hardware reports a tachometer value of 0 (which can happen due to an extremely fast pulse, a stuck edge, or a hardware glitch), the calculated tach_div evaluates to 0. The subsequent call to do_div() with tach_div as the divisor triggers a divide-by-zero exception, leading to a kernel panic. Check the divisor against zero to fix the problem.

Risk And Classification

EPSS: 0.002090000 probability, percentile 0.113150000 (date 2026-08-15)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 7e1449cd15d1096157d1a9923b82e37602fb7eb0 a3f98bd397398e2d4a7f98e006b5aaf4d54ebdf3 git Not specified
CNA Linux Linux affected 7e1449cd15d1096157d1a9923b82e37602fb7eb0 898ca04b096b9e4640300eab91468c826a1ec92b git Not specified
CNA Linux Linux affected 7e1449cd15d1096157d1a9923b82e37602fb7eb0 fb8a5afe6f1f8aa7f19c6dda23d277dd6ae5d9e1 git Not specified
CNA Linux Linux affected 7e1449cd15d1096157d1a9923b82e37602fb7eb0 fe87b8dc67f1b2c64e76a66e78468c533d3c44ca git Not specified
CNA Linux Linux affected 6.9 Not specified
CNA Linux Linux unaffected 6.9 semver Not specified
CNA Linux Linux unaffected 6.12.97 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.40 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.5 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2-rc2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/a3f98bd397398e2d4a7f98e006b5aaf4d54ebdf3 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/898ca04b096b9e4640300eab91468c826a1ec92b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/fe87b8dc67f1b2c64e76a66e78468c533d3c44ca 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/fb8a5afe6f1f8aa7f19c6dda23d277dd6ae5d9e1 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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