[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"repo-stars":3,"vuln-DEBIAN-CVE-2023-53673":6},{"stargazers_count":4,"fetched_at":5},7,"2026-06-04T14:53:31.930Z",{"id":7,"descriptions":8,"cisa":9,"weaknesses":10,"exploits":11,"aliases":12,"duplicate_of":9,"upstream":13,"downstream":16,"duplicates":17,"related":18,"reserved_at":9,"published_at":19,"modified_at":20,"state":9,"summary":21,"references_raw":23,"kevs":30,"epss":9,"epss_history":31,"metrics":32,"affected":39},"DEBIAN-CVE-2023-53673","In the Linux kernel, the following vulnerability has been resolved:  Bluetooth: hci_event: call disconnect callback before deleting conn  In hci_cs_disconnect, we do hci_conn_del even if disconnection failed.  ISO, L2CAP and SCO connections refer to the hci_conn without hci_conn_get, so disconn_cfm must be called so they can clean up their conn, otherwise use-after-free occurs.  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:2760: hci0: status 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 status 0x0c ... \u003Cno iso_* activity on sk/conn> ... iso_sock_sendmsg:1098: sock 00000000dea5e2e0, sk 00000000eabd6557 BUG: kernel NULL pointer dereference, address: 0000000000000668 PGD 0 P4D 0 Oops: 0000 [#1] PREEMPT SMP PTI Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-1.fc38 04/01/2014 RIP: 0010:iso_sock_sendmsg (net/bluetooth/iso.c:1112) bluetooth ==========================================================  L2CAP: ================================================================== hci_cmd_status_evt:4359: hci0: opcode 0x0406 hci_cs_disconnect:2760: hci0: status 0x0c hci_sent_cmd_data:3085: hci0 opcode 0x0406 hci_conn_del:1151: hci0 hcon ffff88800c999000 handle 3585 hci_conn_unlink:1102: hci0: hcon ffff88800c999000 hci_chan_list_flush:2780: hcon ffff88800c999000 hci_chan_del:2761: hci0 hcon ffff88800c999000 chan ffff888018ddd280 ... BUG: KASAN: slab-use-after-free in hci_send_acl+0x2d/0x540 [bluetooth] Read of size 8 at addr ffff888018ddd298 by task bluetoothd/1175  CPU: 0 PID: 1175 Comm: bluetoothd Tainted: G            E      6.4.0-rc4+ #2 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-1.fc38 04/01/2014 Call Trace:  \u003CTASK>  dump_stack_lvl+0x5b/0x90  print_report+0xcf/0x670  ? __virt_addr_valid+0xf8/0x180  ? hci_send_acl+0x2d/0x540 [bluetooth]  kasan_report+0xa8/0xe0  ? hci_send_acl+0x2d/0x540 [bluetooth]  hci_send_acl+0x2d/0x540 [bluetooth]  ? __pfx___lock_acquire+0x10/0x10  l2cap_chan_send+0x1fd/0x1300 [bluetooth]  ? l2cap_sock_sendmsg+0xf2/0x170 [bluetooth]  ? __pfx_l2cap_chan_send+0x10/0x10 [bluetooth]  ? lock_release+0x1d5/0x3c0  ? mark_held_locks+0x1a/0x90  l2cap_sock_sendmsg+0x100/0x170 [bluetooth]  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 \u003C48> 3d 00 f0 ff ff 77 54 c3 0f 1f 00 48 83 ec 28 89 54 24 1c 48 89 RSP: 002b:00007fff21ae09b8 EFLAGS: 00000202 ORIG_RAX: 0000000000000014 RAX: ffffffffffffffda RBX:  ---truncated---",null,[],[],[],[14],{"_key":15},"CVE-2023-53673",[],[],[],"2025-10-07T16:15:51.247Z","2026-04-28T20:27:07.133403Z",{"cisa_kev":22,"cisa_ransomware":22,"cisa_vendor":9,"epss_severity":9,"epss_score":9,"severity":9,"severity_score":9,"severity_version":9,"severity_source":9,"severity_vector":9,"severity_status":9},false,[24],{"url":25,"sources":26,"tags":28},"https://security-tracker.debian.org/tracker/CVE-2023-53673",[27],"osv_debian",[29],"Advisory",[],[],[33],{"source":27,"cvss_v2_0":9,"cvss_v3_0":9,"cvss_v3_1":34,"cvss_v4_0":9},{"baseScore":35,"baseSeverity":9,"vectorString":36,"impactScore":37,"exploitabilityScore":38},7.8,"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",9.8,4.6,[40],{"ecosystem":41,"name":42,"vendor":43,"product":42,"cpe_part":9,"purl_type":44,"purl_namespace":43,"purl_name":42,"source":9,"versions":45},"Debian","linux","debian","deb",[46,50,54,57],{"version":47,"is_range":48,"range_type":49,"version_start":9,"version_start_type":9,"version_end":9,"version_end_type":9,"fixed_in":9},"all",true,"ecosystem",{"version":51,"is_range":48,"range_type":49,"version_start":9,"version_start_type":9,"version_end":52,"version_end_type":53,"fixed_in":9},"lt6_1_52_1","6.1.52-1","excluding",{"version":55,"is_range":48,"range_type":49,"version_start":9,"version_start_type":9,"version_end":56,"version_end_type":53,"fixed_in":9},"lt6_4_11_1","6.4.11-1",{"version":55,"is_range":48,"range_type":49,"version_start":9,"version_start_type":9,"version_end":56,"version_end_type":53,"fixed_in":9}]