CVE-2026-98197 Linux kernel hwmon w83791d - Use After Free

Linux kernel hwmon w83791d driver contains a use-after-free vulnerability caused by incomplete sysfs group removal on driver unbind, letting attackers access stale driver data, exploit requires driver unbind with fan/pwm 4-5 pins not used as GPIO.

CVSS base score 7.0 /10
High
CISA KEV
Not listed
Public exploit
None known
EPSS
0.12% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Use After Free
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
6 October 2026
Updated
15 October 2026

Vendor fix

Update to the latest Linux kernel version containing the fix.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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