Linux/Unix 主機上安裝了一個或多個受到弱點影響的套件，且供應商未提供可用的修補程式。

  - 藍牙hci_event刪除 conn 前呼叫中斷連線回呼。在 hci_cs_disconnect 中即使中斷連線失敗我們也會執行 hci_conn_del。ISO、L2CAP 和 SCO 連線是指沒有 hci_conn_get 的 hci_conn因此必須呼叫 disconn_cfm以便清理其 conn否則會發生釋放後使用。ISO================================================ ========== iso_sock_connect:880: sk 00000000eabd6557 iso_connect_cis:356: 70:1a:b8:98:ff:a2 -> 28:3d:c2:4a:7e:da ... iso_conn_add:140 : hcon 000000001696f1fd conn 00000000b6251073 hci_dev_put:1487: hci0 orig refcnt 17 __iso_chan_add:214: conn 00000000b6251073 iso_sock_clear_timer:117: sock 00000000eabd6557 state 3 ... hci_rx_work:4085: hci0 Event packet hci_event_packet:7601: hci0: event 0x0f hci_cmd_status_evt:4346: hci0 opcode 0x0406 hci_cs_disconnect:2760hci0status 0x0c hci_sent_cmd_data:3107: hci0 opcode 0x0406 hci_conn_del:1151
    hci0 hcon 000000001696f1fd handle 2560 hci_conn_unlink:1102: hci0: hcon 000000001696f1fd hci_conn_drop:1451: hcon 00000000d8521aaf orig refcnt 2 hci_chan_list_flush:2780: hcon 000000001696f1fd hci_dev_put:1487: hci0 orig refcnt 21 hci_dev_put:1487: hci0 orig refcnt 20 hci_req_cmd_complete:3978:
    opcode 0x0406 狀態 0x0c ...<no iso_* activity on sk/conn> ... iso_sock_sendmsg:1098sock 00000000dea5e2e0、sk 00000000eabd6557 錯誤核心 NULL 指標解除參照位址0000000000000668 PGD 0 P4D 0 Oops 0000 [#1] PREEMPT SMP PTI 硬體名稱QEMU Standard PC (Q35 + ICH) QEMU Standard PC ([] + ICH 、 BIOS 1.16.2-1.fc38 04/01/2014 RIP: 0010:iso_sock_sendmsg (net/bluetooth/iso.c:1112) 藍牙 =================== ======================================= L2CAP
    ================================================== ================ hci_cmd_status_evt:4359: hci0: opcode 0x0406 hci_cs_disconnect:2760: hci0: 狀態 0x0c hci_sent_cmd_data:3085: hci0 opcode 0x0406 hci_conn_del:1151: hci0 hcon ffcon ffffffffffffffffff83800cci9990000 handleunlink83585 1102hci0hcon ffff88800c999000 hci_chan_list_flush:2780: hcon ffff88800c999000 hci_chan_del:2761: hci0 hcon ffff88800c999000 chan ffff888018ddd280 ... BUG: KASANhci_send_acl+0x2d/0x540 中發生 slab-use-after-free [藍牙] 任務 bluetoothd/1175 CPU: 0 PID: 1175 Comm
    bluetoothd 受污染GE 6.4.0-rc4+ #2 硬體名稱QEMU Standard PC (Q35 + ICH9, 2009)BIOS 1.16.2-1.fc38 2014 年 4 月 1 日 呼叫追踪 <TASK> dump_stack_lvl+0x5b/0x90 print_report +0xcf/0x670 ?
    __virt_addr_valid+0xf8/0x180 ? hci_send_acl+0x2d/0x540 [藍牙] kasan_report+0xa8/0xe0 hci_send_acl+0x2d/0x540 [藍牙] hci_send_acl+0x2d/0x540 [藍牙] __pfx___lock_acquire+0x10/0x10 l2cap_chan_send+0x1fd/0x1300 [藍牙] l2cap_sock_sendmsg+0xf2/0x170 [藍牙]
    __pfx_l2cap_chan_send+0x10/0x10 [藍牙] lock_release+0x1d5/0x3c0 mark_held_locks+0x1a/0x90 l2cap_sock_sendmsg+0x100/0x170 [藍牙] sock_write_iter+0x275/0x280 __pfx_sock_write_iter+0x10/0x10 ?
    __pfx___lock_acquire+0x10/0x10 do_iter_readv_writev+0x176/0x220 ? __pfx_do_iter_readv_writev+0x10/0x10 ? find_held_lock+0x83/0xa0 ? selinux_file_permission+0x13e/0x210 do_iter_write+0xda/0x340 vfs_writev+0x1b4/0x400 __pfx_vfs_writev+0x10/0x10 ? __seccomp_filter+0x112/0x750 ? populate_seccomp_data+0x182/0x220 ? __fget_light+0xdf/0x100 ? do_writev+0x19d/0x210 do_writev+0x19d/0x210 ? __pfx_do_writev+0x10/0x10 ? mark_held_locks+0x1a/0x90 do_syscall_64+0x60/0x90 ? lockdep_hardirqs_on_prepare+0x149/0x210 do_syscall_64+0x6c/0x90 ? lockdep_hardirqs_on_prepare+0x149/0x210 entry_SYSCALL_64_after_hwframe+0x72/0xdc RIP: 0033:0x7ff45cb23e64 Code: 15 d1 1f 0d 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b8 0f 1f 00 f3 0f 1e fa 80 3d 9d a7 0d 00 00 74 13 b8 14 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 54 c3 0f 1f 00 48 83 ec 28 89 54 24 1c 48 89 RSP
    002b:00007fff21ae09b8 EFLAGS00000202 ORIG_RAX: 0000000000000014 RAXffffffffffffffda RBX
    ---truncated--- (CVE-2023-53673)

請注意，Nessus 依賴供應商報告的套件存在。

偵測

Linux Distros 未修補的弱點：CVE-2023-53673

high Nessus Plugin ID 270151

版本 1.7