CVE-2026-100079 PUBLISHED

usb: typec: ucsi: unregister debugfs entries on teardown

Assigner: Linux
Reserved: 25.09.2026 Published: 25.09.2026 Updated: 25.09.2026

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.

Product Status

Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from df0383ffad64dc09954a60873c1e202b47f08d90 to fb7393519908befdc094be4ea913f582adbf2f7c (excl.)
  • affected from df0383ffad64dc09954a60873c1e202b47f08d90 to 7177c215e69658adbd2f2fc5b72e14be9208d2ba (excl.)
  • affected from df0383ffad64dc09954a60873c1e202b47f08d90 to 1f44d001620fd3caa30619a9bc73e9d15555408b (excl.)
  • affected from df0383ffad64dc09954a60873c1e202b47f08d90 to 62efee351566321ad72a4abaf6eb7d972590585d (excl.)
  • affected from df0383ffad64dc09954a60873c1e202b47f08d90 to eed73a65ab609b79d53de88cccc34b36dfe753c4 (excl.)
Vendor Linux
Product Linux
Versions Default: affected
  • Version 6.6 is affected
  • unaffected from 0 to 6.6 (excl.)
  • unaffected from 6.6.157 to 6.6.* (incl.)
  • unaffected from 6.12.110 to 6.12.* (incl.)
  • unaffected from 6.18.52 to 6.18.* (incl.)
  • unaffected from 7.2.6 to 7.2.* (incl.)
  • unaffected from 7.3-rc1 to * (incl.)

References