CVE-2026-72394

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.

• https://git.kernel.org/stable/c/898ca04b096b9e4640300eab91468c826a1ec92b
• https://git.kernel.org/stable/c/a3f98bd397398e2d4a7f98e006b5aaf4d54ebdf3
• https://git.kernel.org/stable/c/fb8a5afe6f1f8aa7f19c6dda23d277dd6ae5d9e1
• https://git.kernel.org/stable/c/fe87b8dc67f1b2c64e76a66e78468c533d3c44ca

Published

Aug 15, 2026

Last Modified

Aug 17, 2026

Status

Received

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