{"id":20406,"date":"2026-09-10T04:31:43","date_gmt":"2026-09-09T20:31:43","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-80923"},"modified":"2026-09-10T04:31:43","modified_gmt":"2026-09-09T20:31:43","slug":"cve-2026-80923","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-80923","title":{"rendered":"CVE-2026-80923 &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\nxhci: dbgtty: Fix unr"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>xhci: dbgtty: Fix unregister on tty_register_driver() failure<\/p>\n<p>If tty_register_driver() fails, it drops the reference, but fails to set<br \/>\nthe global dbc_tty_driver to NULL, causing the unregister to be called<br \/>\nagain when module exits.<\/p>\n<p>On module unload dbc_tty_exit() only gates its cleanup on the driver<br \/>\npointer being non-NULL, so it operates on the already-freed driver:<\/p>\n<p>    module_init(xhci_hcd_init)<br \/>\n      xhci_hcd_init()<br \/>\n        xhci_dbc_init()                       [return value ignored]<br \/>\n          dbc_tty_init()<br \/>\n            tty_register_driver() fails<br \/>\n              tty_driver_kref_put()           -&gt; driver freed<br \/>\n              (dbc_tty_driver left dangling)<br \/>\n    &#8230;<br \/>\n    module_exit(xhci_hcd_fini)<br \/>\n      xhci_hcd_fini()<br \/>\n        xhci_dbc_exit()<br \/>\n          dbc_tty_exit()<br \/>\n            if (dbc_tty_driver)               -&gt; true (dangling)<br \/>\n              tty_unregister_driver()         -&gt; use-after-free<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>xhci: dbgtty: Fix unregister on tty_register_driver() failure<\/p>\n<p>If tty_register_driver() fails, it drops the reference, but fails to<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-20406","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/20406","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln"}],"about":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/types\/vuln"}],"wp:attachment":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=20406"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=20406"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=20406"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}