{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-80923","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-08-26T14:34:25.801Z","datePublished":"2026-09-09T16:19:43.538Z","dateUpdated":"2026-09-09T16:19:43.538Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-09-09T16:19:43.538Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nxhci: dbgtty: Fix unregister on tty_register_driver() failure\n\nIf tty_register_driver() fails, it drops the reference, but fails to set\nthe global dbc_tty_driver to NULL, causing the unregister to be called\nagain when module exits.\n\nOn module unload dbc_tty_exit() only gates its cleanup on the driver\npointer being non-NULL, so it operates on the already-freed driver:\n\n    module_init(xhci_hcd_init)\n      xhci_hcd_init()\n        xhci_dbc_init()                       [return value ignored]\n          dbc_tty_init()\n            tty_register_driver() fails\n              tty_driver_kref_put()           -> driver freed\n              (dbc_tty_driver left dangling)\n    ...\n    module_exit(xhci_hcd_fini)\n      xhci_hcd_fini()\n        xhci_dbc_exit()\n          dbc_tty_exit()\n            if (dbc_tty_driver)               -> true (dangling)\n              tty_unregister_driver()         -> use-after-free"}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/host/xhci-dbgtty.c"],"versions":[{"version":"4521f16139409cdf9462c7325d43454462cff6c3","lessThan":"01b7bc0938061f2fd46e0094f6483d8c6c02f7d3","status":"affected","versionType":"git"},{"version":"4521f16139409cdf9462c7325d43454462cff6c3","lessThan":"43635ff6401ca0e0ed21875379eeded921321525","status":"affected","versionType":"git"},{"version":"4521f16139409cdf9462c7325d43454462cff6c3","lessThan":"eaca2814f32b9872a332326324b9e83e01f156d2","status":"affected","versionType":"git"},{"version":"4521f16139409cdf9462c7325d43454462cff6c3","lessThan":"943f976c93e70563b132f5585ff68b08c89641a2","status":"affected","versionType":"git"},{"version":"4521f16139409cdf9462c7325d43454462cff6c3","lessThan":"0d0faf3cc44c4d86fc6faf5cea972c0fbe00b922","status":"affected","versionType":"git"},{"version":"4521f16139409cdf9462c7325d43454462cff6c3","lessThan":"33ed35ca629477f57e0dd1d77d6df96cf5a9eb55","status":"affected","versionType":"git"},{"version":"4521f16139409cdf9462c7325d43454462cff6c3","lessThan":"0e469b94fbba8eb03666da41dd1082b793c50c1a","status":"affected","versionType":"git"},{"version":"4521f16139409cdf9462c7325d43454462cff6c3","lessThan":"a916fa66a43e10f63198b6ce978badffc678821a","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/host/xhci-dbgtty.c"],"versions":[{"version":"5.9","status":"affected"},{"version":"0","lessThan":"5.9","status":"unaffected","versionType":"semver"},{"version":"5.15.220","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.187","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.156","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.108","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.49","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.1.13","lessThanOrEqual":"7.1.*","status":"unaffected","versionType":"semver"},{"version":"7.2.3","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3-rc1","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.9","versionEndExcluding":"5.15.220"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.9","versionEndExcluding":"6.1.187"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.9","versionEndExcluding":"6.6.156"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.9","versionEndExcluding":"6.12.108"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.9","versionEndExcluding":"6.18.49"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.9","versionEndExcluding":"7.1.13"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.9","versionEndExcluding":"7.2.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.9","versionEndExcluding":"7.3-rc1"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/01b7bc0938061f2fd46e0094f6483d8c6c02f7d3"},{"url":"https://git.kernel.org/stable/c/43635ff6401ca0e0ed21875379eeded921321525"},{"url":"https://git.kernel.org/stable/c/eaca2814f32b9872a332326324b9e83e01f156d2"},{"url":"https://git.kernel.org/stable/c/943f976c93e70563b132f5585ff68b08c89641a2"},{"url":"https://git.kernel.org/stable/c/0d0faf3cc44c4d86fc6faf5cea972c0fbe00b922"},{"url":"https://git.kernel.org/stable/c/33ed35ca629477f57e0dd1d77d6df96cf5a9eb55"},{"url":"https://git.kernel.org/stable/c/0e469b94fbba8eb03666da41dd1082b793c50c1a"},{"url":"https://git.kernel.org/stable/c/a916fa66a43e10f63198b6ce978badffc678821a"}],"title":"xhci: dbgtty: Fix unregister on tty_register_driver() failure","x_generator":{"engine":"bippy-1.2.0"}}}}