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CVE-2026-98197

7.0 · HIGH

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() creat…

Published Oct 6, 2026EPSS 0.12%

Overview

CVE-2026-98197 is a high-severity vulnerability. It was published on October 6, 2026 and has a CVSS 3.1 base score of 7.0 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.0, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/081e3a78453635fb370b1712809d2af29e60b4c5Refgit.kernel.org/stable/c/0ff9c7775e51ac6d47b1bb5c46f06b1434fe58a8Refgit.kernel.org/stable/c/2c381e6e0f033f2df13bd64905e7232c42f49009Refgit.kernel.org/stable/c/2ccf6c512290a288a2d4d7f076430dfb0c6ee476Refgit.kernel.org/stable/c/2dd37d00f1f1af8e02ffa70ee573c10fd1a76864Refgit.kernel.org/stable/c/583e04e88e75b8d57304015d83c38e82a9531600Refgit.kernel.org/stable/c/b1d419eb3bc41245c3d3d99dfe1a7b6c45989586Refgit.kernel.org/stable/c/f6e2ab72f32d16d71a2549c7ea062dd209f71670

How CyberStrike helps

Frequently asked questions

What is CVE-2026-98197?

CVE-2026-98197 is a high-severity vulnerability. It was published on October 6, 2026 and has a CVSS 3.1 base score of 7.0 (HIGH).

How severe is CVE-2026-98197?

This vulnerability has a CVSS 3.1 base score of 7.0, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-98197?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-98197?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-98197 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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