CVE-2026-80923

CVE CVE-2026-80923EUVD EUVD-2026-75100Published 2026-09-09T16:19:43.000Z

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: xhci: dbgtty: Fix unregister on tty_register_driver() failure If tty_register_driver() fails, it drops the reference, but fails to set the global dbc_tty_driver to NULL, causing the unregister to be called again when module exits. On module unload dbc_tty_exit() only gates its cleanup on the driver pointer being non-NULL, so it operates on the already-freed driver: module_init(xhci_hcd_init) xhci_hcd_init() xhci_dbc_init() [return value ignored] dbc_tty_init() tty_register_driver() fails tty_driver_kref_put() -> driver freed (dbc_tty_driver left dangling) ... module_exit(xhci_hcd_fini) xhci_hcd_fini() xhci_dbc_exit() dbc_tty_exit() if (dbc_tty_driver) -> true (dangling) tty_unregister_driver() -> use-after-free

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux patch: 0; patch: 5.15.220; 4521f16139409cdf9462c7325d43454462cff6c3 <0e469b94fbba8eb03666da41dd1082b793c50c1a; 4521f16139409cdf9462c7325d43454462cff6c3 <0d0faf3cc44c4d86fc6faf5cea972c0fbe00b922; 4521f16139409cdf9462c7325d43454462cff6c3 <eaca2814f32b9872a332326324b9e83e01f156d2; 4521f16139409cdf9462c7325d43454462cff6c3 <43635ff6401ca0e0ed21875379eeded921321525; patch: 7.3-rc1; 4521f16139409cdf9462c7325d43454462cff6c3 <01b7bc0938061f2fd46e0094f6483d8c6c02f7d3; patch: 7.1.13; patch: 7.2.3; patch: 6.18.49; 4521f16139409cdf9462c7325d43454462cff6c3 <a916fa66a43e10f63198b6ce978badffc678821a; 5.9; 4521f16139409cdf9462c7325d43454462cff6c3 <943f976c93e70563b132f5585ff68b08c89641a2; patch: 6.12.108; patch: 6.1.187; patch: 6.6.156; 4521f16139409cdf9462c7325d43454462cff6c3 <33ed35ca629477f57e0dd1d77d6df96cf5a9eb55

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

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Linux — Linux

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