What’s Vulnerable › Vulnerabilities

CVE-2026-100079: usb: typec: ucsi: unregister debugfs entries on teardown

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-25 · updated 2026-10-19
• Weakness: CWE-772

Description

In the Linux kernel, the following vulnerability has been resolved: usb: typec: ucsi: unregister debugfs entries on teardown ucsi_register() creates per-instance debugfs entries, but ucsi_unregister() keeps them around until ucsi_destroy(). Drivers like ucsi_glink that unregister/register the same UCSI instance across remoteproc restart then try to create an already existing debugfs directory and log: debugfs: 'pmic_glink.ucsi.0' already exists in 'ucsi' Unregister debugfs entries as part of ucsi_unregister(), and clear ucsi->debugfs after freeing it so repeated unregister paths remain safe.

Affected products

• Linux kernel: from 6.6 before 6.6.157; from 6.7 before 6.12.110; from 6.13 before 6.18.52; from 6.19 before 7.2.6 — fixed in 6.12.110, 6.18.52, 6.6.157, 7.2.6

How to fix

Upgrade to a fixed version: Linux kernel 6.12.110, 6.18.52, 6.6.157, 7.2.6. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/1f44d001620fd3caa30619a9bc73e9d15555408b
• https://git.kernel.org/stable/c/62efee351566321ad72a4abaf6eb7d972590585d
• https://git.kernel.org/stable/c/7177c215e69658adbd2f2fc5b72e14be9208d2ba
• https://git.kernel.org/stable/c/eed73a65ab609b79d53de88cccc34b36dfe753c4
• https://git.kernel.org/stable/c/fb7393519908befdc094be4ea913f582adbf2f7c

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