{"id":"CVE-2026-100079","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: typec: ucsi: unregister debugfs entries on teardown\n\nucsi_register() creates per-instance debugfs entries, but\nucsi_unregister() keeps them around until ucsi_destr…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: typec: ucsi: unregister debugfs entries on teardown\n\nucsi_register() creates per-instance debugfs entries, but\nucsi_unregister() keeps them around until ucsi_destr…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-772","CWE-459"],"vendor":"linux","product":"linux_kernel","affected":["linux_kernel >= 6.6, < 6.6.157","linux_kernel >= 6.7, < 6.12.110","linux_kernel >= 6.13, < 6.18.52","linux_kernel >= 6.19, < 7.2.6"],"patched":["linux_kernel 7.2.6"],"published":"2026-09-25","updated":"2026-10-02","sourceUpdated":"2026-10-02T20:18:49.117","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-100079","references":[{"url":"https://git.kernel.org/stable/c/1f44d001620fd3caa30619a9bc73e9d15555408b","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/62efee351566321ad72a4abaf6eb7d972590585d","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/7177c215e69658adbd2f2fc5b72e14be9208d2ba","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/eed73a65ab609b79d53de88cccc34b36dfe753c4","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/fb7393519908befdc094be4ea913f582adbf2f7c","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-100079.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-100079"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2541420"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-100079"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-100079"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-100079.mbox"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.00114,"epssPercentile":0.01442,"ingestedAt":"2026-09-25T14:09:46.374Z","slug":"CVE-2026-100079","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nusb: typec: ucsi: unregister debugfs entries on teardown\n\nucsi_register() creates per-instance debugfs entries, but\nucsi_unregister() keeps them around until ucsi_destroy().\n\nDrivers like ucsi_glink that unregister/register the same UCSI\ninstance across remoteproc restart then try to create an already\nexisting debugfs directory and log:\n\n  debugfs: 'pmic_glink.ucsi.0' already exists in 'ucsi'\n\nUnregister debugfs entries as part of ucsi_unregister(), and\nclear ucsi->debugfs after freeing it so repeated unregister\npaths remain safe.\n\n## Affected\n\n- `linux_kernel >= 6.6, < 6.6.157`\n- `linux_kernel >= 6.7, < 6.12.110`\n- `linux_kernel >= 6.13, < 6.18.52`\n- `linux_kernel >= 6.19, < 7.2.6`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 7.2.6`\n\n## Vendor advisories\n\n- **Red Hat VEX** · Low · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-10-16 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-100079.json)","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":214183,"id":"CVE-2026-100079","ts":1790841337777,"field":"cvss","old":null,"new":"5.5"},{"seq":214182,"id":"CVE-2026-100079","ts":1790841337777,"field":"severity","old":"none","new":"medium"}]}