{"id":"DEBIAN-CVE-2025-40309","details":"In the Linux kernel, the following vulnerability has been resolved:  Bluetooth: SCO: Fix UAF on sco_conn_free  BUG: KASAN: slab-use-after-free in sco_conn_free net/bluetooth/sco.c:87 [inline] BUG: KASAN: slab-use-after-free in kref_put include/linux/kref.h:65 [inline] BUG: KASAN: slab-use-after-free in sco_conn_put+0xdd/0x410 net/bluetooth/sco.c:107 Write of size 8 at addr ffff88811cb96b50 by task kworker/u17:4/352  CPU: 1 UID: 0 PID: 352 Comm: kworker/u17:4 Not tainted 6.17.0-rc5-g717368f83676 #4 PREEMPT(voluntary) Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014 Workqueue: hci13 hci_cmd_sync_work Call Trace:  \u003cTASK\u003e  __dump_stack lib/dump_stack.c:94 [inline]  dump_stack_lvl+0x10b/0x170 lib/dump_stack.c:120  print_address_description mm/kasan/report.c:378 [inline]  print_report+0x191/0x550 mm/kasan/report.c:482  kasan_report+0xc4/0x100 mm/kasan/report.c:595  sco_conn_free net/bluetooth/sco.c:87 [inline]  kref_put include/linux/kref.h:65 [inline]  sco_conn_put+0xdd/0x410 net/bluetooth/sco.c:107  sco_connect_cfm+0xb4/0xae0 net/bluetooth/sco.c:1441  hci_connect_cfm include/net/bluetooth/hci_core.h:2082 [inline]  hci_conn_failed+0x20a/0x2e0 net/bluetooth/hci_conn.c:1313  hci_conn_unlink+0x55f/0x810 net/bluetooth/hci_conn.c:1121  hci_conn_del+0xb6/0x1110 net/bluetooth/hci_conn.c:1147  hci_abort_conn_sync+0x8c5/0xbb0 net/bluetooth/hci_sync.c:5689  hci_cmd_sync_work+0x281/0x380 net/bluetooth/hci_sync.c:332  process_one_work kernel/workqueue.c:3236 [inline]  process_scheduled_works+0x77e/0x1040 kernel/workqueue.c:3319  worker_thread+0xbee/0x1200 kernel/workqueue.c:3400  kthread+0x3c7/0x870 kernel/kthread.c:463  ret_from_fork+0x13a/0x1e0 arch/x86/kernel/process.c:148  ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245  \u003c/TASK\u003e  Allocated by task 31370:  kasan_save_stack mm/kasan/common.c:47 [inline]  kasan_save_track+0x30/0x70 mm/kasan/common.c:68  poison_kmalloc_redzone mm/kasan/common.c:388 [inline]  __kasan_kmalloc+0x82/0x90 mm/kasan/common.c:405  kasan_kmalloc include/linux/kasan.h:260 [inline]  __do_kmalloc_node mm/slub.c:4382 [inline]  __kmalloc_noprof+0x22f/0x390 mm/slub.c:4394  kmalloc_noprof include/linux/slab.h:909 [inline]  sk_prot_alloc+0xae/0x220 net/core/sock.c:2239  sk_alloc+0x34/0x5a0 net/core/sock.c:2295  bt_sock_alloc+0x3c/0x330 net/bluetooth/af_bluetooth.c:151  sco_sock_alloc net/bluetooth/sco.c:562 [inline]  sco_sock_create+0xc0/0x350 net/bluetooth/sco.c:593  bt_sock_create+0x161/0x3b0 net/bluetooth/af_bluetooth.c:135  __sock_create+0x3ad/0x780 net/socket.c:1589  sock_create net/socket.c:1647 [inline]  __sys_socket_create net/socket.c:1684 [inline]  __sys_socket+0xd5/0x330 net/socket.c:1731  __do_sys_socket net/socket.c:1745 [inline]  __se_sys_socket net/socket.c:1743 [inline]  __x64_sys_socket+0x7a/0x90 net/socket.c:1743  do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]  do_syscall_64+0xc7/0x240 arch/x86/entry/syscall_64.c:94  entry_SYSCALL_64_after_hwframe+0x77/0x7f  Freed by task 31374:  kasan_save_stack mm/kasan/common.c:47 [inline]  kasan_save_track+0x30/0x70 mm/kasan/common.c:68  kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:576  poison_slab_object mm/kasan/common.c:243 [inline]  __kasan_slab_free+0x3d/0x50 mm/kasan/common.c:275  kasan_slab_free include/linux/kasan.h:233 [inline]  slab_free_hook mm/slub.c:2428 [inline]  slab_free mm/slub.c:4701 [inline]  kfree+0x199/0x3b0 mm/slub.c:4900  sk_prot_free net/core/sock.c:2278 [inline]  __sk_destruct+0x4aa/0x630 net/core/sock.c:2373  sco_sock_release+0x2ad/0x300 net/bluetooth/sco.c:1333  __sock_release net/socket.c:649 [inline]  sock_close+0xb8/0x230 net/socket.c:1439  __fput+0x3d1/0x9e0 fs/file_table.c:468  task_work_run+0x206/0x2a0 kernel/task_work.c:227  get_signal+0x1201/0x1410 kernel/signal.c:2807  arch_do_signal_or_restart+0x34/0x740 arch/x86/kernel/signal.c:337  exit_to_user_mode_loop+0x68/0xc0 kernel/entry/common.c:40  exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]  s ---truncated---","modified":"2026-09-01T16:06:17.834835488Z","published":"2025-12-08T01:16:03.207Z","upstream":["CVE-2025-40309"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2025-40309"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.159-1"}]}],"versions":["6.1.106-1","6.1.106-2","6.1.106-3","6.1.112-1","6.1.115-1","6.1.119-1","6.1.123-1","6.1.124-1","6.1.128-1","6.1.129-1","6.1.133-1","6.1.135-1","6.1.137-1","6.1.139-1","6.1.140-1","6.1.147-1","6.1.148-1","6.1.153-1","6.1.158-1","6.1.27-1","6.1.37-1","6.1.38-1","6.1.38-2","6.1.38-2~bpo11+1","6.1.38-3","6.1.38-4","6.1.38-4~bpo11+1","6.1.52-1","6.1.55-1","6.1.55-1~bpo11+1","6.1.64-1","6.1.66-1","6.1.67-1","6.1.69-1","6.1.69-1~bpo11+1","6.1.76-1","6.1.76-1~bpo11+1","6.1.82-1","6.1.85-1","6.1.90-1","6.1.90-1~bpo11+1","6.1.94-1","6.1.94-1~bpo11+1","6.1.98-1","6.1.99-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2025-40309.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.12.63-1"}]}],"versions":["6.12.38-1","6.12.41-1","6.12.43-1","6.12.43-1~bpo12+1","6.12.48-1","6.12.57-1","6.12.57-1~bpo12+1","6.12.63-1~bpo12+1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2025-40309.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.17.8-1"}]}],"versions":["6.12.100-1","6.12.101-1","6.12.105-1","6.12.107-1","6.12.38-1","6.12.41-1","6.12.43-1","6.12.43-1~bpo12+1","6.12.48-1","6.12.57-1","6.12.57-1~bpo12+1","6.12.63-1","6.12.63-1~bpo12+1","6.12.69-1","6.12.69-1~bpo12+1","6.12.73-1","6.12.73-1~bpo12+1","6.12.74-1","6.12.74-2","6.12.74-2~bpo12+1","6.12.85-1","6.12.85-1~bpo12+1","6.12.86-1","6.12.86-1~bpo12+1","6.12.88-1","6.12.88-1~bpo12+1","6.12.90-1","6.12.90-1~bpo12+1","6.12.90-2","6.12.90-2~bpo12+1","6.12.94-1","6.12.94-1~bpo12+1","6.12.95-1","6.12.95-1~bpo12+1","6.12.96-1","6.13.10-1~exp1","6.13.11-1~exp1","6.13.2-1~exp1","6.13.3-1~exp1","6.13.4-1~exp1","6.13.5-1~exp1","6.13.6-1~exp1","6.13.7-1~exp1","6.13.8-1~exp1","6.13.9-1~exp1","6.13~rc6-1~exp1","6.13~rc7-1~exp1","6.14.3-1~exp1","6.14.5-1~exp1","6.14.6-1~exp1","6.15-1~exp1","6.15.1-1~exp1","6.15.2-1~exp1","6.15.3-1~exp1","6.15.4-1~exp1","6.15.5-1~exp1","6.15.6-1~exp1","6.15~rc7-1~exp1","6.16-1~exp1","6.16.1-1~exp1","6.16.10-1","6.16.11-1","6.16.12-1","6.16.12-1~bpo13+1","6.16.12-2","6.16.3-1","6.16.3-1~bpo13+1","6.16.5-1","6.16.6-1","6.16.7-1","6.16.8-1","6.16.9-1","6.16~rc7-1~exp1","6.17.2-1~exp1","6.17.5-1~exp1","6.17.6-1","6.17.7-1","6.17.7-2","6.17.8-1~bpo13+1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2025-40309.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}