{"id":"CVE-2026-72394","summary":"hwmon: (aspeed-g6-pwm-tach) Guard fan RPM calculation against divide-by-zero","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nhwmon: (aspeed-g6-pwm-tach) Guard fan RPM calculation against divide-by-zero\n\nSashiko reports:\n\nIn the aspeed-g6-pwm-tacho driver, the aspeed_tach_val_to_rpm() function\ncalculates the fan RPM using the tachometer value. However, it does not\ncheck if the tachometer value is zero before performing the division.\n\nIf the hardware reports a tachometer value of 0 (which can happen due to\nan extremely fast pulse, a stuck edge, or a hardware glitch), the\ncalculated tach_div evaluates to 0. The subsequent call to do_div() with\ntach_div as the divisor triggers a divide-by-zero exception, leading to\na kernel panic.\n\nCheck the divisor against zero to fix the problem.","modified":"2026-08-18T03:31:23.426150097Z","published":"2026-08-15T05:56:21.707Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72394.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/898ca04b096b9e4640300eab91468c826a1ec92b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a3f98bd397398e2d4a7f98e006b5aaf4d54ebdf3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/fb8a5afe6f1f8aa7f19c6dda23d277dd6ae5d9e1"},{"type":"WEB","url":"https://git.kernel.org/stable/c/fe87b8dc67f1b2c64e76a66e78468c533d3c44ca"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72394.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72394"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"7e1449cd15d1096157d1a9923b82e37602fb7eb0"},{"fixed":"a3f98bd397398e2d4a7f98e006b5aaf4d54ebdf3"},{"fixed":"898ca04b096b9e4640300eab91468c826a1ec92b"},{"fixed":"fb8a5afe6f1f8aa7f19c6dda23d277dd6ae5d9e1"},{"fixed":"fe87b8dc67f1b2c64e76a66e78468c533d3c44ca"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72394.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.9.0"},{"fixed":"6.12.97"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.40"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.5"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72394.json"}}],"schema_version":"1.9.0"}