CVE-2026-80923: Linux

Описание

Оригинално описание

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

Засегнати продукти

• Linux Linux: 4521f16139409cdf9462c7325d43454462cff6c3 преди 01b7bc0938061f2fd46e0094f6483d8c6c02f7d3; 4521f16139409cdf9462c7325d43454462cff6c3 преди 43635ff6401ca0e0ed21875379eeded921321525; 4521f16139409cdf9462c7325d43454462cff6c3 преди eaca2814f32b9872a332326324b9e83e01f156d2; 4521f16139409cdf9462c7325d43454462cff6c3 преди 943f976c93e70563b132f5585ff68b08c89641a2; 4521f16139409cdf9462c7325d43454462cff6c3 преди 0d0faf3cc44c4d86fc6faf5cea972c0fbe00b922; 4521f16139409cdf9462c7325d43454462cff6c3 преди 33ed35ca629477f57e0dd1d77d6df96cf5a9eb55; 4521f16139409cdf9462c7325d43454462cff6c3 преди 0e469b94fbba8eb03666da41dd1082b793c50c1a; 4521f16139409cdf9462c7325d43454462cff6c3 преди a916fa66a43e10f63198b6ce978badffc678821a
• Linux Linux: 5.9; преди 5.9; 5.15.220 до 5.15.*; 6.1.187 до 6.1.*; 6.6.156 до 6.6.*; 6.12.108 до 6.12.*; 6.18.49 до 6.18.*; 7.1.13 до 7.1.*; 7.2.3 до 7.2.*; от 7.3 нататък

История

Други уязвимости в Linux Linux

• 8.1CVE-2026-99270
• 7.8CVE-2026-99269
• CVE-2026-99265
• CVE-2026-99261
• CVE-2026-99260

Първоизточници

• https://www.cve.org/CVERecord?id=CVE-2026-80923
• https://nvd.nist.gov/vuln/detail/CVE-2026-80923
• https://git.kernel.org/stable/c/01b7bc0938061f2fd46e0094f6483d8c6c02f7d3
• https://git.kernel.org/stable/c/43635ff6401ca0e0ed21875379eeded921321525
• https://git.kernel.org/stable/c/eaca2814f32b9872a332326324b9e83e01f156d2
• https://git.kernel.org/stable/c/943f976c93e70563b132f5585ff68b08c89641a2
• https://git.kernel.org/stable/c/0d0faf3cc44c4d86fc6faf5cea972c0fbe00b922
• https://git.kernel.org/stable/c/33ed35ca629477f57e0dd1d77d6df96cf5a9eb55
• https://git.kernel.org/stable/c/0e469b94fbba8eb03666da41dd1082b793c50c1a
• https://git.kernel.org/stable/c/a916fa66a43e10f63198b6ce978badffc678821a