{"document":{"aggregate_severity":{"namespace":"https://www.suse.com/support/security/rating/","text":"important"},"category":"csaf_security_advisory","csaf_version":"2.0","distribution":{"text":"Copyright 2024 SUSE LLC. All rights reserved.","tlp":{"label":"WHITE","url":"https://www.first.org/tlp/"}},"lang":"en","notes":[{"category":"summary","text":"Security update for the Linux Kernel (Live Patch 42 for SUSE Linux Enterprise 15 SP4)","title":"Title of the patch"},{"category":"description","text":"\nThis update for the SUSE Linux Enterprise kernel 5.14.21-150400.24.170 fixes one security issue\n\nThe following security issue was fixed:\n\n- CVE-2023-53673: Bluetooth: hci_event: call disconnect callback before deleting conn (bsc#1251983).\n","title":"Description of the patch"},{"category":"details","text":"SUSE-2025-4237,SUSE-2025-4241,SUSE-SLE-Module-Live-Patching-15-SP4-2025-4237","title":"Patchnames"},{"category":"legal_disclaimer","text":"CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).","title":"Terms of use"}],"publisher":{"category":"vendor","contact_details":"https://www.suse.com/support/security/contact/","name":"SUSE Product Security Team","namespace":"https://www.suse.com/"},"references":[{"category":"external","summary":"SUSE ratings","url":"https://www.suse.com/support/security/rating/"},{"category":"self","summary":"URL of this CSAF notice","url":"https://ftp.suse.com/pub/projects/security/csaf/suse-su-2025_4237-1.json"},{"category":"self","summary":"URL for SUSE-SU-2025:4237-1","url":"https://www.suse.com/support/update/announcement/2025/suse-su-20254237-1/"},{"category":"self","summary":"E-Mail link for SUSE-SU-2025:4237-1","url":"https://lists.suse.com/pipermail/sle-security-updates/2025-November/023362.html"},{"category":"self","summary":"SUSE Bug 1251983","url":"https://bugzilla.suse.com/1251983"},{"category":"self","summary":"SUSE CVE CVE-2023-53673 page","url":"https://www.suse.com/security/cve/CVE-2023-53673/"}],"title":"Security update for the Linux Kernel (Live Patch 42 for SUSE Linux Enterprise 15 SP4)","tracking":{"current_release_date":"2025-11-25T16:04:17Z","generator":{"date":"2025-11-25T16:04:17Z","engine":{"name":"cve-database.git:bin/generate-csaf.pl","version":"1"}},"id":"SUSE-SU-2025:4237-1","initial_release_date":"2025-11-25T16:04:17Z","revision_history":[{"date":"2025-11-25T16:04:17Z","number":"1","summary":"Current version"}],"status":"final","version":"1"}},"product_tree":{"branches":[{"branches":[{"branches":[{"category":"product_version","name":"kernel-livepatch-5_14_21-150400_24_170-default-8-150400.2.1.ppc64le","product":{"name":"kernel-livepatch-5_14_21-150400_24_170-default-8-150400.2.1.ppc64le","product_id":"kernel-livepatch-5_14_21-150400_24_170-default-8-150400.2.1.ppc64le"}},{"category":"product_version","name":"kernel-livepatch-5_14_21-150400_24_176-default-4-150400.2.1.ppc64le","product":{"name":"kernel-livepatch-5_14_21-150400_24_176-default-4-150400.2.1.ppc64le","product_id":"kernel-livepatch-5_14_21-150400_24_176-default-4-150400.2.1.ppc64le"}}],"category":"architecture","name":"ppc64le"},{"branches":[{"category":"product_version","name":"kernel-livepatch-5_14_21-150400_24_170-default-8-150400.2.1.s390x","product":{"name":"kernel-livepatch-5_14_21-150400_24_170-default-8-150400.2.1.s390x","product_id":"kernel-livepatch-5_14_21-150400_24_170-default-8-150400.2.1.s390x"}},{"category":"product_version","name":"kernel-livepatch-5_14_21-150400_24_176-default-4-150400.2.1.s390x","product":{"name":"kernel-livepatch-5_14_21-150400_24_176-default-4-150400.2.1.s390x","product_id":"kernel-livepatch-5_14_21-150400_24_176-default-4-150400.2.1.s390x"}}],"category":"architecture","name":"s390x"},{"branches":[{"category":"product_version","name":"kernel-livepatch-5_14_21-150400_24_170-default-8-150400.2.1.x86_64","product":{"name":"kernel-livepatch-5_14_21-150400_24_170-default-8-150400.2.1.x86_64","product_id":"kernel-livepatch-5_14_21-150400_24_170-default-8-150400.2.1.x86_64"}},{"category":"product_version","name":"kernel-livepatch-5_14_21-150400_24_176-default-4-150400.2.1.x86_64","product":{"name":"kernel-livepatch-5_14_21-150400_24_176-default-4-150400.2.1.x86_64","product_id":"kernel-livepatch-5_14_21-150400_24_176-default-4-150400.2.1.x86_64"}}],"category":"architecture","name":"x86_64"},{"branches":[{"category":"product_name","name":"SUSE Linux Enterprise Live Patching 15 SP4","product":{"name":"SUSE Linux Enterprise Live Patching 15 SP4","product_id":"SUSE Linux Enterprise Live Patching 15 SP4","product_identification_helper":{"cpe":"cpe:/o:suse:sle-module-live-patching:15:sp4"}}}],"category":"product_family","name":"SUSE Linux Enterprise"}],"category":"vendor","name":"SUSE"}],"relationships":[{"category":"default_component_of","full_product_name":{"name":"kernel-livepatch-5_14_21-150400_24_170-default-8-150400.2.1.ppc64le as component of SUSE Linux Enterprise Live Patching 15 SP4","product_id":"SUSE Linux Enterprise Live Patching 15 SP4:kernel-livepatch-5_14_21-150400_24_170-default-8-150400.2.1.ppc64le"},"product_reference":"kernel-livepatch-5_14_21-150400_24_170-default-8-150400.2.1.ppc64le","relates_to_product_reference":"SUSE Linux Enterprise Live Patching 15 SP4"},{"category":"default_component_of","full_product_name":{"name":"kernel-livepatch-5_14_21-150400_24_170-default-8-150400.2.1.s390x as component of SUSE Linux Enterprise Live Patching 15 SP4","product_id":"SUSE Linux Enterprise Live Patching 15 SP4:kernel-livepatch-5_14_21-150400_24_170-default-8-150400.2.1.s390x"},"product_reference":"kernel-livepatch-5_14_21-150400_24_170-default-8-150400.2.1.s390x","relates_to_product_reference":"SUSE Linux Enterprise Live Patching 15 SP4"},{"category":"default_component_of","full_product_name":{"name":"kernel-livepatch-5_14_21-150400_24_170-default-8-150400.2.1.x86_64 as component of SUSE Linux Enterprise Live Patching 15 SP4","product_id":"SUSE Linux Enterprise Live Patching 15 SP4:kernel-livepatch-5_14_21-150400_24_170-default-8-150400.2.1.x86_64"},"product_reference":"kernel-livepatch-5_14_21-150400_24_170-default-8-150400.2.1.x86_64","relates_to_product_reference":"SUSE Linux Enterprise Live Patching 15 SP4"}]},"vulnerabilities":[{"cve":"CVE-2023-53673","ids":[{"system_name":"SUSE CVE Page","text":"https://www.suse.com/security/cve/CVE-2023-53673"}],"notes":[{"category":"general","text":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_event: call disconnect callback before deleting conn\n\nIn hci_cs_disconnect, we do hci_conn_del even if disconnection failed.\n\nISO, L2CAP and SCO connections refer to the hci_conn without\nhci_conn_get, so disconn_cfm must be called so they can clean up their\nconn, otherwise use-after-free occurs.\n\nISO:\n==========================================================\niso_sock_connect:880: sk 00000000eabd6557\niso_connect_cis:356: 70:1a:b8:98:ff:a2 -> 28:3d:c2:4a:7e:da\n...\niso_conn_add:140: hcon 000000001696f1fd conn 00000000b6251073\nhci_dev_put:1487: hci0 orig refcnt 17\n__iso_chan_add:214: conn 00000000b6251073\niso_sock_clear_timer:117: sock 00000000eabd6557 state 3\n...\nhci_rx_work:4085: hci0 Event packet\nhci_event_packet:7601: hci0: event 0x0f\nhci_cmd_status_evt:4346: hci0: opcode 0x0406\nhci_cs_disconnect:2760: hci0: status 0x0c\nhci_sent_cmd_data:3107: hci0 opcode 0x0406\nhci_conn_del:1151: hci0 hcon 000000001696f1fd handle 2560\nhci_conn_unlink:1102: hci0: hcon 000000001696f1fd\nhci_conn_drop:1451: hcon 00000000d8521aaf orig refcnt 2\nhci_chan_list_flush:2780: hcon 000000001696f1fd\nhci_dev_put:1487: hci0 orig refcnt 21\nhci_dev_put:1487: hci0 orig refcnt 20\nhci_req_cmd_complete:3978: opcode 0x0406 status 0x0c\n... <no iso_* activity on sk/conn> ...\niso_sock_sendmsg:1098: sock 00000000dea5e2e0, sk 00000000eabd6557\nBUG: kernel NULL pointer dereference, address: 0000000000000668\nPGD 0 P4D 0\nOops: 0000 [#1] PREEMPT SMP PTI\nHardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-1.fc38 04/01/2014\nRIP: 0010:iso_sock_sendmsg (net/bluetooth/iso.c:1112) bluetooth\n==========================================================\n\nL2CAP:\n==================================================================\nhci_cmd_status_evt:4359: hci0: opcode 0x0406\nhci_cs_disconnect:2760: hci0: status 0x0c\nhci_sent_cmd_data:3085: hci0 opcode 0x0406\nhci_conn_del:1151: hci0 hcon ffff88800c999000 handle 3585\nhci_conn_unlink:1102: hci0: hcon ffff88800c999000\nhci_chan_list_flush:2780: hcon ffff88800c999000\nhci_chan_del:2761: hci0 hcon ffff88800c999000 chan ffff888018ddd280\n...\nBUG: KASAN: slab-use-after-free in hci_send_acl+0x2d/0x540 [bluetooth]\nRead of size 8 at addr ffff888018ddd298 by task bluetoothd/1175\n\nCPU: 0 PID: 1175 Comm: bluetoothd Tainted: G            E      6.4.0-rc4+ #2\nHardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-1.fc38 04/01/2014\nCall Trace:\n <TASK>\n dump_stack_lvl+0x5b/0x90\n print_report+0xcf/0x670\n ? __virt_addr_valid+0xf8/0x180\n ? hci_send_acl+0x2d/0x540 [bluetooth]\n kasan_report+0xa8/0xe0\n ? hci_send_acl+0x2d/0x540 [bluetooth]\n hci_send_acl+0x2d/0x540 [bluetooth]\n ? __pfx___lock_acquire+0x10/0x10\n l2cap_chan_send+0x1fd/0x1300 [bluetooth]\n ? l2cap_sock_sendmsg+0xf2/0x170 [bluetooth]\n ? __pfx_l2cap_chan_send+0x10/0x10 [bluetooth]\n ? lock_release+0x1d5/0x3c0\n ? mark_held_locks+0x1a/0x90\n l2cap_sock_sendmsg+0x100/0x170 [bluetooth]\n sock_write_iter+0x275/0x280\n ? __pfx_sock_write_iter+0x10/0x10\n ? __pfx___lock_acquire+0x10/0x10\n do_iter_readv_writev+0x176/0x220\n ? __pfx_do_iter_readv_writev+0x10/0x10\n ? find_held_lock+0x83/0xa0\n ? selinux_file_permission+0x13e/0x210\n do_iter_write+0xda/0x340\n vfs_writev+0x1b4/0x400\n ? __pfx_vfs_writev+0x10/0x10\n ? __seccomp_filter+0x112/0x750\n ? populate_seccomp_data+0x182/0x220\n ? __fget_light+0xdf/0x100\n ? do_writev+0x19d/0x210\n do_writev+0x19d/0x210\n ? __pfx_do_writev+0x10/0x10\n ? mark_held_locks+0x1a/0x90\n do_syscall_64+0x60/0x90\n ? lockdep_hardirqs_on_prepare+0x149/0x210\n ? do_syscall_64+0x6c/0x90\n ? lockdep_hardirqs_on_prepare+0x149/0x210\n entry_SYSCALL_64_after_hwframe+0x72/0xdc\nRIP: 0033:0x7ff45cb23e64\nCode: 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\nRSP: 002b:00007fff21ae09b8 EFLAGS: 00000202 ORIG_RAX: 0000000000000014\nRAX: ffffffffffffffda RBX: \n---truncated---","title":"CVE description"}],"product_status":{"recommended":["SUSE Linux Enterprise Live Patching 15 SP4:kernel-livepatch-5_14_21-150400_24_170-default-8-150400.2.1.ppc64le","SUSE Linux Enterprise Live Patching 15 SP4:kernel-livepatch-5_14_21-150400_24_170-default-8-150400.2.1.s390x","SUSE Linux Enterprise Live Patching 15 SP4:kernel-livepatch-5_14_21-150400_24_170-default-8-150400.2.1.x86_64"]},"references":[{"category":"external","summary":"CVE-2023-53673","url":"https://www.suse.com/security/cve/CVE-2023-53673"},{"category":"external","summary":"SUSE Bug 1251763 for CVE-2023-53673","url":"https://bugzilla.suse.com/1251763"},{"category":"external","summary":"SUSE Bug 1251983 for CVE-2023-53673","url":"https://bugzilla.suse.com/1251983"}],"remediations":[{"category":"vendor_fix","details":"To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n","product_ids":["SUSE Linux Enterprise Live Patching 15 SP4:kernel-livepatch-5_14_21-150400_24_170-default-8-150400.2.1.ppc64le","SUSE Linux Enterprise Live Patching 15 SP4:kernel-livepatch-5_14_21-150400_24_170-default-8-150400.2.1.s390x","SUSE Linux Enterprise Live Patching 15 SP4:kernel-livepatch-5_14_21-150400_24_170-default-8-150400.2.1.x86_64"]}],"scores":[{"cvss_v3":{"baseScore":7,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"products":["SUSE Linux Enterprise Live Patching 15 SP4:kernel-livepatch-5_14_21-150400_24_170-default-8-150400.2.1.ppc64le","SUSE Linux Enterprise Live Patching 15 SP4:kernel-livepatch-5_14_21-150400_24_170-default-8-150400.2.1.s390x","SUSE Linux Enterprise Live Patching 15 SP4:kernel-livepatch-5_14_21-150400_24_170-default-8-150400.2.1.x86_64"]}],"threats":[{"category":"impact","date":"2025-11-25T16:04:17Z","details":"important"}],"title":"CVE-2023-53673"}]}