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CVE-2026-100079 is an incomplete cleanup vulnerability in the Linux kernel USB Type-C UCSI subsystem. ucsi_register() creates per-instance debugfs entries, but ucsi_unregister() leaves those entries registered until ucsi_destroy(). Drivers such as ucsi_glink that unregister and re-register the same UCSI instance across a remoteproc restart consequently attempt to create an already-existing debugfs directory. The fix removes debugfs entries during ucsi_unregister() and clears the associated pointer after freeing it to keep repeated unregister paths safe.
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A Linux kernel vulnerability listed among the fixes in Debian advisory DSA-6528-1. Debian provides the corrected Trixie Linux source package version 6.12.111-1. Individual technical details and severity are not supplied in the content.
A debugfs lifecycle flaw in the Linux kernel's USB Type-C UCSI subsystem leaves per-instance debugfs entries behind after unregistering a UCSI instance. Re-registering that instance, such as following a remoteproc restart with ucsi_glink, causes directory-creation conflicts. The fix removes debugfs entries during ucsi_unregister() and clears ucsi->debugfs after freeing it to keep repeated unregister paths safe. The advisory does not describe an exploitation mechanism or security impact.
A named vulnerability referenced by a Nessus plugin for Debian Linux 13.0. The content provides no technical description of the flaw beyond its association with an unpatched-vendor check.
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