{"id":"CVE-2026-100079","state":"PUBLISHED","title":"usb: typec: ucsi: unregister debugfs entries on teardown","description":"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_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.","publishedAt":"2026-09-25T13:06:49.915Z","updatedAt":"2026-10-19T08:43:11.422Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"df0383ffad64dc09954a60873c1e202b47f08d90","status":"affected","lessThan":"fb7393519908befdc094be4ea913f582adbf2f7c","versionType":"git"},{"version":"df0383ffad64dc09954a60873c1e202b47f08d90","status":"affected","lessThan":"7177c215e69658adbd2f2fc5b72e14be9208d2ba","versionType":"git"},{"version":"df0383ffad64dc09954a60873c1e202b47f08d90","status":"affected","lessThan":"1f44d001620fd3caa30619a9bc73e9d15555408b","versionType":"git"},{"version":"df0383ffad64dc09954a60873c1e202b47f08d90","status":"affected","lessThan":"62efee351566321ad72a4abaf6eb7d972590585d","versionType":"git"},{"version":"df0383ffad64dc09954a60873c1e202b47f08d90","status":"affected","lessThan":"eed73a65ab609b79d53de88cccc34b36dfe753c4","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/typec/ucsi/debugfs.c","drivers/usb/typec/ucsi/ucsi.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.6","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.6","versionType":"semver"},{"version":"6.6.157","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.110","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.52","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.6","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/typec/ucsi/debugfs.c","drivers/usb/typec/ucsi/ucsi.c"]}],"references":["https://git.kernel.org/stable/c/fb7393519908befdc094be4ea913f582adbf2f7c","https://git.kernel.org/stable/c/7177c215e69658adbd2f2fc5b72e14be9208d2ba","https://git.kernel.org/stable/c/1f44d001620fd3caa30619a9bc73e9d15555408b","https://git.kernel.org/stable/c/62efee351566321ad72a4abaf6eb7d972590585d","https://git.kernel.org/stable/c/eed73a65ab609b79d53de88cccc34b36dfe753c4"],"weaknesses":[],"ingestedAt":"2026-10-29T20:10:13.529Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/100xxx/CVE-2026-100079.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-100079","state":"PUBLISHED","datePublished":"2026-09-25T13:06:49.915Z","dateUpdated":"2026-10-19T08:43:11.422Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-25T10:25:14.456Z"},"containers":{"cna":{"title":"usb: typec: ucsi: unregister debugfs entries on teardown","descriptions":[{"lang":"en","value":"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_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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"df0383ffad64dc09954a60873c1e202b47f08d90","status":"affected","lessThan":"fb7393519908befdc094be4ea913f582adbf2f7c","versionType":"git"},{"version":"df0383ffad64dc09954a60873c1e202b47f08d90","status":"affected","lessThan":"7177c215e69658adbd2f2fc5b72e14be9208d2ba","versionType":"git"},{"version":"df0383ffad64dc09954a60873c1e202b47f08d90","status":"affected","lessThan":"1f44d001620fd3caa30619a9bc73e9d15555408b","versionType":"git"},{"version":"df0383ffad64dc09954a60873c1e202b47f08d90","status":"affected","lessThan":"62efee351566321ad72a4abaf6eb7d972590585d","versionType":"git"},{"version":"df0383ffad64dc09954a60873c1e202b47f08d90","status":"affected","lessThan":"eed73a65ab609b79d53de88cccc34b36dfe753c4","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/typec/ucsi/debugfs.c","drivers/usb/typec/ucsi/ucsi.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.6","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.6","versionType":"semver"},{"version":"6.6.157","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.110","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.52","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.6","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/typec/ucsi/debugfs.c","drivers/usb/typec/ucsi/ucsi.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/fb7393519908befdc094be4ea913f582adbf2f7c"},{"url":"https://git.kernel.org/stable/c/7177c215e69658adbd2f2fc5b72e14be9208d2ba"},{"url":"https://git.kernel.org/stable/c/1f44d001620fd3caa30619a9bc73e9d15555408b"},{"url":"https://git.kernel.org/stable/c/62efee351566321ad72a4abaf6eb7d972590585d"},{"url":"https://git.kernel.org/stable/c/eed73a65ab609b79d53de88cccc34b36dfe753c4"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T08:43:11.422Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"6.6.157"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"6.12.110"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"6.18.52"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"7.2.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}