Riskcovery

CVE-2026-72394

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

State
Published
Severity
Not scored
Published
Aug 15, 2026
Updated
Aug 17, 2026
Reserved
Aug 9, 2026

Read the record on cve.org

Description

In 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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • 7e1449cd15d1096157d1a9923b82e37602fb7eb0 to before a3f98bd397398e2d4a7f98e006b5aaf4d54ebdf3Affected
  • 7e1449cd15d1096157d1a9923b82e37602fb7eb0 to before 898ca04b096b9e4640300eab91468c826a1ec92bAffected
  • 7e1449cd15d1096157d1a9923b82e37602fb7eb0 to before fb8a5afe6f1f8aa7f19c6dda23d277dd6ae5d9e1Affected
  • 7e1449cd15d1096157d1a9923b82e37602fb7eb0 to before fe87b8dc67f1b2c64e76a66e78468c533d3c44caAffected
LinuxLinux
  • 6.9Affected
  • before 6.9Not affected
  • 6.12.97 through 6.12.*Not affected
  • 6.18.40 through 6.18.*Not affected
  • 7.1.5 through 7.1.*Not affected
  • 7.2 and laterNot affected

References

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