{"id":"CVE-2024-27398","summary":"Bluetooth: Fix use-after-free bugs caused by sco_sock_timeout","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: Fix use-after-free bugs caused by sco_sock_timeout\n\nWhen the sco connection is established and then, the sco socket\nis releasing, timeout_work will be scheduled to judge whether\nthe sco disconnection is timeout. The sock will be deallocated\nlater, but it is dereferenced again in sco_sock_timeout. As a\nresult, the use-after-free bugs will happen. The root cause is\nshown below:\n\n    Cleanup Thread               |      Worker Thread\nsco_sock_release                 |\n  sco_sock_close                 |\n    __sco_sock_close             |\n      sco_sock_set_timer         |\n        schedule_delayed_work    |\n  sco_sock_kill                  |    (wait a time)\n    sock_put(sk) //FREE          |  sco_sock_timeout\n                                 |    sock_hold(sk) //USE\n\nThe KASAN report triggered by POC is shown below:\n\n[   95.890016] ==================================================================\n[   95.890496] BUG: KASAN: slab-use-after-free in sco_sock_timeout+0x5e/0x1c0\n[   95.890755] Write of size 4 at addr ffff88800c388080 by task kworker/0:0/7\n...\n[   95.890755] Workqueue: events sco_sock_timeout\n[   95.890755] Call Trace:\n[   95.890755]  \u003cTASK\u003e\n[   95.890755]  dump_stack_lvl+0x45/0x110\n[   95.890755]  print_address_description+0x78/0x390\n[   95.890755]  print_report+0x11b/0x250\n[   95.890755]  ? __virt_addr_valid+0xbe/0xf0\n[   95.890755]  ? sco_sock_timeout+0x5e/0x1c0\n[   95.890755]  kasan_report+0x139/0x170\n[   95.890755]  ? update_load_avg+0xe5/0x9f0\n[   95.890755]  ? sco_sock_timeout+0x5e/0x1c0\n[   95.890755]  kasan_check_range+0x2c3/0x2e0\n[   95.890755]  sco_sock_timeout+0x5e/0x1c0\n[   95.890755]  process_one_work+0x561/0xc50\n[   95.890755]  worker_thread+0xab2/0x13c0\n[   95.890755]  ? pr_cont_work+0x490/0x490\n[   95.890755]  kthread+0x279/0x300\n[   95.890755]  ? pr_cont_work+0x490/0x490\n[   95.890755]  ? kthread_blkcg+0xa0/0xa0\n[   95.890755]  ret_from_fork+0x34/0x60\n[   95.890755]  ? kthread_blkcg+0xa0/0xa0\n[   95.890755]  ret_from_fork_asm+0x11/0x20\n[   95.890755]  \u003c/TASK\u003e\n[   95.890755]\n[   95.890755] Allocated by task 506:\n[   95.890755]  kasan_save_track+0x3f/0x70\n[   95.890755]  __kasan_kmalloc+0x86/0x90\n[   95.890755]  __kmalloc+0x17f/0x360\n[   95.890755]  sk_prot_alloc+0xe1/0x1a0\n[   95.890755]  sk_alloc+0x31/0x4e0\n[   95.890755]  bt_sock_alloc+0x2b/0x2a0\n[   95.890755]  sco_sock_create+0xad/0x320\n[   95.890755]  bt_sock_create+0x145/0x320\n[   95.890755]  __sock_create+0x2e1/0x650\n[   95.890755]  __sys_socket+0xd0/0x280\n[   95.890755]  __x64_sys_socket+0x75/0x80\n[   95.890755]  do_syscall_64+0xc4/0x1b0\n[   95.890755]  entry_SYSCALL_64_after_hwframe+0x67/0x6f\n[   95.890755]\n[   95.890755] Freed by task 506:\n[   95.890755]  kasan_save_track+0x3f/0x70\n[   95.890755]  kasan_save_free_info+0x40/0x50\n[   95.890755]  poison_slab_object+0x118/0x180\n[   95.890755]  __kasan_slab_free+0x12/0x30\n[   95.890755]  kfree+0xb2/0x240\n[   95.890755]  __sk_destruct+0x317/0x410\n[   95.890755]  sco_sock_release+0x232/0x280\n[   95.890755]  sock_close+0xb2/0x210\n[   95.890755]  __fput+0x37f/0x770\n[   95.890755]  task_work_run+0x1ae/0x210\n[   95.890755]  get_signal+0xe17/0xf70\n[   95.890755]  arch_do_signal_or_restart+0x3f/0x520\n[   95.890755]  syscall_exit_to_user_mode+0x55/0x120\n[   95.890755]  do_syscall_64+0xd1/0x1b0\n[   95.890755]  entry_SYSCALL_64_after_hwframe+0x67/0x6f\n[   95.890755]\n[   95.890755] The buggy address belongs to the object at ffff88800c388000\n[   95.890755]  which belongs to the cache kmalloc-1k of size 1024\n[   95.890755] The buggy address is located 128 bytes inside of\n[   95.890755]  freed 1024-byte region [ffff88800c388000, ffff88800c388400)\n[   95.890755]\n[   95.890755] The buggy address belongs to the physical page:\n[   95.890755] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800c38a800 pfn:0xc388\n[   95.890755] head: order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0\n[   95.890755] ano\n---truncated---","modified":"2026-10-08T02:48:21.836495832Z","published":"2024-05-13T10:22:26.624Z","related":["SUSE-SU-2024:1979-1","SUSE-SU-2024:1983-1","SUSE-SU-2024:2008-1","SUSE-SU-2024:2010-1","SUSE-SU-2024:2011-1","SUSE-SU-2024:2019-1","SUSE-SU-2024:2135-1","SUSE-SU-2024:2183-1","SUSE-SU-2024:2184-1","SUSE-SU-2024:2185-1","SUSE-SU-2024:2189-1","SUSE-SU-2024:2190-1","SUSE-SU-2024:2203-1","SUSE-SU-2024:2719-1","SUSE-SU-2024:2722-1","SUSE-SU-2024:2723-1","SUSE-SU-2024:2724-1","SUSE-SU-2024:2725-1","SUSE-SU-2024:2726-1","SUSE-SU-2024:2734-1","SUSE-SU-2024:2740-1","SUSE-SU-2024:2750-1","SUSE-SU-2024:2751-1","SUSE-SU-2024:2755-1","SUSE-SU-2024:2758-1","SUSE-SU-2024:2759-1","SUSE-SU-2024:2760-1","SUSE-SU-2024:2771-1","SUSE-SU-2024:2773-1","SUSE-SU-2024:2792-1","SUSE-SU-2024:2793-1","SUSE-SU-2024:2815-1","SUSE-SU-2024:2818-1","SUSE-SU-2024:2821-1","SUSE-SU-2024:2822-1","SUSE-SU-2024:2824-1","SUSE-SU-2024:2825-1","SUSE-SU-2024:2827-1","SUSE-SU-2024:2840-1","SUSE-SU-2024:2841-1","SUSE-SU-2024:2843-1","SUSE-SU-2024:2850-1","SUSE-SU-2024:2851-1","SUSE-SU-2024:2852-1","SUSE-SU-2024:2874-1","SUSE-SU-2024:3015-1","SUSE-SU-2024:3034-1","SUSE-SU-2024:3037-1","SUSE-SU-2024:3039-1","SUSE-SU-2024:3043-1","SUSE-SU-2024:3044-1","SUSE-SU-2024:3048-1","SUSE-SU-2024:3318-1","SUSE-SU-2024:3320-1","SUSE-SU-2024:3334-1","SUSE-SU-2024:3336-1","SUSE-SU-2024:3347-1","SUSE-SU-2024:3348-1","SUSE-SU-2024:3349-1","SUSE-SU-2024:3363-1","SUSE-SU-2024:3368-1","SUSE-SU-2024:3370-1","SUSE-SU-2024:3375-1","SUSE-SU-2024:3379-1","SUSE-SU-2024:3399-1","SUSE-SU-2024:3623-1","SUSE-SU-2024:3625-1","SUSE-SU-2024:3631-1","SUSE-SU-2024:3632-1","SUSE-SU-2024:3639-1","SUSE-SU-2024:3642-1","SUSE-SU-2024:3649-1","SUSE-SU-2024:3651-1","SUSE-SU-2024:3652-1","SUSE-SU-2024:3662-1","SUSE-SU-2024:3663-1","SUSE-SU-2024:3679-1","SUSE-SU-2024:3685-1","SUSE-SU-2024:3694-1","SUSE-SU-2024:3695-1","SUSE-SU-2024:3696-1","SUSE-SU-2024:3697-1","SUSE-SU-2024:3700-1","SUSE-SU-2024:3701-1","SUSE-SU-2024:3710-1","SUSE-SU-2024:3793-1","SUSE-SU-2024:3796-1","SUSE-SU-2024:3798-1","SUSE-SU-2024:3803-1","SUSE-SU-2024:3806-1","SUSE-SU-2024:3814-1","SUSE-SU-2024:3815-1","SUSE-SU-2024:3820-1","SUSE-SU-2024:3821-1","SUSE-SU-2024:3829-1","SUSE-SU-2024:3830-1","SUSE-SU-2024:3831-1","SUSE-SU-2024:3837-1","SUSE-SU-2024:3842-1","SUSE-SU-2024:3849-1","SUSE-SU-2024:3851-1","SUSE-SU-2024:3852-1","SUSE-SU-2024:3854-1","SUSE-SU-2024:3855-1","SUSE-SU-2024:3857-1","SUSE-SU-2024:3860-1","SUSE-SU-2024:4122-1","SUSE-SU-2024:4123-1","SUSE-SU-2024:4124-1","SUSE-SU-2024:4125-1","SUSE-SU-2024:4180-1","SUSE-SU-2024:4207-1","SUSE-SU-2024:4214-1","SUSE-SU-2024:4216-1","SUSE-SU-2024:4218-1","SUSE-SU-2024:4226-1","SUSE-SU-2024:4234-1","SUSE-SU-2024:4235-1","SUSE-SU-2024:4236-1","SUSE-SU-2024:4242-1","SUSE-SU-2024:4243-1","SUSE-SU-2024:4249-1","SUSE-SU-2024:4250-1","SUSE-SU-2024:4256-1","SUSE-SU-2024:4263-1","SUSE-SU-2024:4264-1","SUSE-SU-2024:4266-1","SUSE-SU-2025:0091-1","SUSE-SU-2025:0101-1","SUSE-SU-2025:0103-1","SUSE-SU-2025:0106-1","SUSE-SU-2025:0107-1","SUSE-SU-2025:0109-1","SUSE-SU-2025:0114-1","SUSE-SU-2025:0115-1","SUSE-SU-2025:0124-1","SUSE-SU-2025:0137-1","SUSE-SU-2025:0146-1","SUSE-SU-2025:0150-1","SUSE-SU-2025:0158-1","SUSE-SU-2025:0164-1","SUSE-SU-2025:0238-1","SUSE-SU-2025:0240-1","SUSE-SU-2025:0244-1","SUSE-SU-2025:0248-1","SUSE-SU-2025:0251-1","SUSE-SU-2025:0252-1","SUSE-SU-2025:0253-1","SUSE-SU-2025:0254-1","SUSE-SU-2025:0261-1","SUSE-SU-2025:0264-1","SUSE-SU-2025:0266-1","SUSE-SU-2025:20008-1","SUSE-SU-2025:20028-1","SUSE-SU-2025:20166-1","SUSE-SU-2025:20249-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/27xxx/CVE-2024-27398.json"},"references":[{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2024/11/29/1"},{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2024/11/30/1"},{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2024/11/30/2"},{"type":"WEB","url":"https://git.kernel.org/stable/c/012363cb1bec5f33a7b94629ab2c1086f30280f2"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1b33d55fb7355e27f8c82cd4ecd560f162469249"},{"type":"WEB","url":"https://git.kernel.org/stable/c/3212afd00e3cda790fd0583cb3eaef8f9575a014"},{"type":"WEB","url":"https://git.kernel.org/stable/c/33a6e92161a78c1073d90e27abe28d746feb0a53"},{"type":"WEB","url":"https://git.kernel.org/stable/c/483bc08181827fc475643272ffb69c533007e546"},{"type":"WEB","url":"https://git.kernel.org/stable/c/50c2037fc28df870ef29d9728c770c8955d32178"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6a18eeb1b3bbc67c20d9609c31dca6a69b4bcde5"},{"type":"WEB","url":"https://git.kernel.org/stable/c/bfab2c1f7940a232cd519e82fff137e308abfd93"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2024/06/msg00019.html"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedo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