{"id":"AZL-52099","summary":"CVE-2024-49950 affecting package kernel for versions less than 5.15.176.3-1","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: L2CAP: Fix uaf in l2cap_connect\n\n[Syzbot reported]\nBUG: KASAN: slab-use-after-free in l2cap_connect.constprop.0+0x10d8/0x1270 net/bluetooth/l2cap_core.c:3949\nRead of size 8 at addr ffff8880241e9800 by task kworker/u9:0/54\n\nCPU: 0 UID: 0 PID: 54 Comm: kworker/u9:0 Not tainted 6.11.0-rc6-syzkaller-00268-g788220eee30d #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024\nWorkqueue: hci2 hci_rx_work\nCall Trace:\n \u003cTASK\u003e\n __dump_stack lib/dump_stack.c:93 [inline]\n dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:119\n print_address_description mm/kasan/report.c:377 [inline]\n print_report+0xc3/0x620 mm/kasan/report.c:488\n kasan_report+0xd9/0x110 mm/kasan/report.c:601\n l2cap_connect.constprop.0+0x10d8/0x1270 net/bluetooth/l2cap_core.c:3949\n l2cap_connect_req net/bluetooth/l2cap_core.c:4080 [inline]\n l2cap_bredr_sig_cmd net/bluetooth/l2cap_core.c:4772 [inline]\n l2cap_sig_channel net/bluetooth/l2cap_core.c:5543 [inline]\n l2cap_recv_frame+0xf0b/0x8eb0 net/bluetooth/l2cap_core.c:6825\n l2cap_recv_acldata+0x9b4/0xb70 net/bluetooth/l2cap_core.c:7514\n hci_acldata_packet net/bluetooth/hci_core.c:3791 [inline]\n hci_rx_work+0xaab/0x1610 net/bluetooth/hci_core.c:4028\n process_one_work+0x9c5/0x1b40 kernel/workqueue.c:3231\n process_scheduled_works kernel/workqueue.c:3312 [inline]\n worker_thread+0x6c8/0xed0 kernel/workqueue.c:3389\n kthread+0x2c1/0x3a0 kernel/kthread.c:389\n ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147\n ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244\n...\n\nFreed by task 5245:\n kasan_save_stack+0x33/0x60 mm/kasan/common.c:47\n kasan_save_track+0x14/0x30 mm/kasan/common.c:68\n kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:579\n poison_slab_object+0xf7/0x160 mm/kasan/common.c:240\n __kasan_slab_free+0x32/0x50 mm/kasan/common.c:256\n kasan_slab_free include/linux/kasan.h:184 [inline]\n slab_free_hook mm/slub.c:2256 [inline]\n slab_free mm/slub.c:4477 [inline]\n kfree+0x12a/0x3b0 mm/slub.c:4598\n l2cap_conn_free net/bluetooth/l2cap_core.c:1810 [inline]\n kref_put include/linux/kref.h:65 [inline]\n l2cap_conn_put net/bluetooth/l2cap_core.c:1822 [inline]\n l2cap_conn_del+0x59d/0x730 net/bluetooth/l2cap_core.c:1802\n l2cap_connect_cfm+0x9e6/0xf80 net/bluetooth/l2cap_core.c:7241\n hci_connect_cfm include/net/bluetooth/hci_core.h:1960 [inline]\n hci_conn_failed+0x1c3/0x370 net/bluetooth/hci_conn.c:1265\n hci_abort_conn_sync+0x75a/0xb50 net/bluetooth/hci_sync.c:5583\n abort_conn_sync+0x197/0x360 net/bluetooth/hci_conn.c:2917\n hci_cmd_sync_work+0x1a4/0x410 net/bluetooth/hci_sync.c:328\n process_one_work+0x9c5/0x1b40 kernel/workqueue.c:3231\n process_scheduled_works kernel/workqueue.c:3312 [inline]\n worker_thread+0x6c8/0xed0 kernel/workqueue.c:3389\n kthread+0x2c1/0x3a0 kernel/kthread.c:389\n ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147\n ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244","modified":"2026-04-01T05:16:28.785061Z","published":"2024-10-21T18:15:16Z","upstream":["CVE-2024-49950"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-49950"}],"affected":[{"package":{"name":"kernel","ecosystem":"Azure Linux:2","purl":"pkg:rpm/azure-linux/kernel"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.15.176.3-1"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-52099.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}