{"id":"DEBIAN-CVE-2024-49950","details":"In the Linux kernel, the following vulnerability has been resolved:  Bluetooth: L2CAP: Fix uaf in l2cap_connect  [Syzbot reported] BUG: KASAN: slab-use-after-free in l2cap_connect.constprop.0+0x10d8/0x1270 net/bluetooth/l2cap_core.c:3949 Read of size 8 at addr ffff8880241e9800 by task kworker/u9:0/54  CPU: 0 UID: 0 PID: 54 Comm: kworker/u9:0 Not tainted 6.11.0-rc6-syzkaller-00268-g788220eee30d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 Workqueue: hci2 hci_rx_work Call Trace:  \u003cTASK\u003e  __dump_stack lib/dump_stack.c:93 [inline]  dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:119  print_address_description mm/kasan/report.c:377 [inline]  print_report+0xc3/0x620 mm/kasan/report.c:488  kasan_report+0xd9/0x110 mm/kasan/report.c:601  l2cap_connect.constprop.0+0x10d8/0x1270 net/bluetooth/l2cap_core.c:3949  l2cap_connect_req net/bluetooth/l2cap_core.c:4080 [inline]  l2cap_bredr_sig_cmd net/bluetooth/l2cap_core.c:4772 [inline]  l2cap_sig_channel net/bluetooth/l2cap_core.c:5543 [inline]  l2cap_recv_frame+0xf0b/0x8eb0 net/bluetooth/l2cap_core.c:6825  l2cap_recv_acldata+0x9b4/0xb70 net/bluetooth/l2cap_core.c:7514  hci_acldata_packet net/bluetooth/hci_core.c:3791 [inline]  hci_rx_work+0xaab/0x1610 net/bluetooth/hci_core.c:4028  process_one_work+0x9c5/0x1b40 kernel/workqueue.c:3231  process_scheduled_works kernel/workqueue.c:3312 [inline]  worker_thread+0x6c8/0xed0 kernel/workqueue.c:3389  kthread+0x2c1/0x3a0 kernel/kthread.c:389  ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147  ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 ...  Freed by task 5245:  kasan_save_stack+0x33/0x60 mm/kasan/common.c:47  kasan_save_track+0x14/0x30 mm/kasan/common.c:68  kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:579  poison_slab_object+0xf7/0x160 mm/kasan/common.c:240  __kasan_slab_free+0x32/0x50 mm/kasan/common.c:256  kasan_slab_free include/linux/kasan.h:184 [inline]  slab_free_hook mm/slub.c:2256 [inline]  slab_free mm/slub.c:4477 [inline]  kfree+0x12a/0x3b0 mm/slub.c:4598  l2cap_conn_free net/bluetooth/l2cap_core.c:1810 [inline]  kref_put include/linux/kref.h:65 [inline]  l2cap_conn_put net/bluetooth/l2cap_core.c:1822 [inline]  l2cap_conn_del+0x59d/0x730 net/bluetooth/l2cap_core.c:1802  l2cap_connect_cfm+0x9e6/0xf80 net/bluetooth/l2cap_core.c:7241  hci_connect_cfm include/net/bluetooth/hci_core.h:1960 [inline]  hci_conn_failed+0x1c3/0x370 net/bluetooth/hci_conn.c:1265  hci_abort_conn_sync+0x75a/0xb50 net/bluetooth/hci_sync.c:5583  abort_conn_sync+0x197/0x360 net/bluetooth/hci_conn.c:2917  hci_cmd_sync_work+0x1a4/0x410 net/bluetooth/hci_sync.c:328  process_one_work+0x9c5/0x1b40 kernel/workqueue.c:3231  process_scheduled_works kernel/workqueue.c:3312 [inline]  worker_thread+0x6c8/0xed0 kernel/workqueue.c:3389  kthread+0x2c1/0x3a0 kernel/kthread.c:389  ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147  ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244","modified":"2026-09-15T09:03:12.628990457Z","published":"2024-10-21T18:15:16.417Z","upstream":["CVE-2024-49950"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2024-49950"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.119-1"}]}],"versions":["6.1.106-1","6.1.106-2","6.1.106-3","6.1.112-1","6.1.115-1","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-2024-49950.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.11.4-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2024-49950.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.11.4-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2024-49950.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}