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CVE-2026-98197

HIGHCVSS 7/10EPSS 0.22%

Last modified

CVE-2026-98197 is a high-severity vulnerability rated 7/10 on the CVSS scale. In the Linux kernel, the following vulnerability has been resolved: hwmon: (w83791d) remove fan/pwm 4-5 sysfs group on remove When the fan/pwm 4-5 pins are not used as GPIO, w83791d_probe() creates the w83791d_group_fanpwm45 sysfs group on the I2C client device. The probe error path removes this group when a later initialization step fails, but the normal remove path only removes w83791d_group. As a result, the optional fan/pwm 4-5 sysfs files can remain after the driver is unbound. The callbacks associated with these files access the driver data, which is devm allocated and released after driver unbind. Leaving the sysfs files behind can therefore result in accesses to stale driver data. Remove w83791d_group_fanpwm45 during normal teardown as well. This issue was found by manual code inspection.. EPSS estimates a 0.22% chance of exploitation in the next 30 days.

Description

In the Linux kernel, the following vulnerability has been resolved: hwmon: (w83791d) remove fan/pwm 4-5 sysfs group on remove When the fan/pwm 4-5 pins are not used as GPIO, w83791d_probe() creates the w83791d_group_fanpwm45 sysfs group on the I2C client device. The probe error path removes this group when a later initialization step fails, but the normal remove path only removes w83791d_group. As a result, the optional fan/pwm 4-5 sysfs files can remain after the driver is unbound. The callbacks associated with these files access the driver data, which is devm allocated and released after driver unbind. Leaving the sysfs files behind can therefore result in accesses to stale driver data. Remove w83791d_group_fanpwm45 during normal teardown as well. This issue was found by manual code inspection.

Metrics

CVSS 3.1
7/10

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability
0.22%

11.4th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 6e1ecd9b8f1358ed4d099f0c54434240dc40debe, < 081e3a78453635fb370b1712809d2af29e60b4c5; >= 6e1ecd9b8f1358ed4d099f0c54434240dc40debe, < b1d419eb3bc41245c3d3d99dfe1a7b6c45989586; >= 6e1ecd9b8f1358ed4d099f0c54434240dc40debe, < 2ccf6c512290a288a2d4d7f076430dfb0c6ee476; >= 6e1ecd9b8f1358ed4d099f0c54434240dc40debe, < f6e2ab72f32d16d71a2549c7ea062dd209f71670; >= 6e1ecd9b8f1358ed4d099f0c54434240dc40debe, < 2dd37d00f1f1af8e02ffa70ee573c10fd1a76864; >= 6e1ecd9b8f1358ed4d099f0c54434240dc40debe, < 2c381e6e0f033f2df13bd64905e7232c42f49009; >= 6e1ecd9b8f1358ed4d099f0c54434240dc40debe, < 583e04e88e75b8d57304015d83c38e82a9531600; >= 6e1ecd9b8f1358ed4d099f0c54434240dc40debe, < 0ff9c7775e51ac6d47b1bb5c46f06b1434fe58a8
LinuxLinux2.6.28

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-98197?
In the Linux kernel, the following vulnerability has been resolved: hwmon: (w83791d) remove fan/pwm 4-5 sysfs group on remove When the fan/pwm 4-5 pins are not used as GPIO, w83791d_probe() creates the w83791d_group_fanpwm45 sysfs group on the I2C client device. The probe error path removes this group when a later initialization step fails, but the normal remove path only removes w83791d_group. As a result, the optional fan/pwm 4-5 sysfs files can remain after the driver is unbound. The callbacks associated with these files access the driver data, which is devm allocated and released after driver unbind. Leaving the sysfs files behind can therefore result in accesses to stale driver data. Remove w83791d_group_fanpwm45 during normal teardown as well. This issue was found by manual code inspection.
How severe is CVE-2026-98197?
CVE-2026-98197 has a CVSS score of 7/10 (HIGH severity). The EPSS model estimates a 0.22% probability of exploitation in the next 30 days.
How do I fix CVE-2026-98197?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST