CVE-2026-90256: Linux

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: use proto_lock for l2cap_data to fix l2cap_disconn_ind hci_conn::l2cap_data is accessed without locks in l2cap_disconn_ind via hci_conn_timeout (disc_work) -> hci_proto_disconn_ind -> l2cap_disconn_ind. This is UAF if the l2cap_conn is deleted concurrently. disc_work is disabled sync in hci_conn_del(), so we cannot take hci_dev_lock in disc_work. Fix by using proto_lock to guard l2cap_data, in addition to hdev->lock which is held in other access paths.

Засегнати продукти

• Linux Linux: efc30877bd4bc85fefe98d80af60fafc86e5775e преди 0fa448369c87e20b2aeaeaca0187d698dd61f791; f87271d21dd4ee83857ca11b94e7b4952749bbae преди 7c032b6d48a46634cbd58aaebad2638c00ad3b51; ab4eedb790cae44313759b50fe47da285e2519d5 преди b495a3a9b33bc4e4613e685bf5c96c136caa22d8; ab4eedb790cae44313759b50fe47da285e2519d5 преди 2b66c83ff1751d6bd3201b3017206262ab46dc05; 18ab6b6078fa8191ca30a3065d57bf35d5635761; 6.6.84 преди 6.6.160; 6.12.20 преди 6.12.114; 6.13.8 преди 6.14
• Linux Linux: 6.14; преди 6.14; 6.6.160 до 6.6.*; 6.12.114 до 6.12.*; 7.2.6 до 7.2.*; от 7.3 нататък

История

Други уязвимости в Linux Linux

• 8.1CVE-2026-99270
• 7.8CVE-2026-99269
• CVE-2026-99268
• CVE-2026-99266
• CVE-2026-99267

Първоизточници

• https://www.cve.org/CVERecord?id=CVE-2026-90256
• https://nvd.nist.gov/vuln/detail/CVE-2026-90256
• https://git.kernel.org/stable/c/0fa448369c87e20b2aeaeaca0187d698dd61f791
• https://git.kernel.org/stable/c/7c032b6d48a46634cbd58aaebad2638c00ad3b51
• https://git.kernel.org/stable/c/b495a3a9b33bc4e4613e685bf5c96c136caa22d8
• https://git.kernel.org/stable/c/2b66c83ff1751d6bd3201b3017206262ab46dc05