CVE-2026-43322 in Linux
요약
\~에 의해 VulDB • 2026. 05. 21.
리눅스 커널에서 다음 취약점이 해결되었습니다:
블루투스: hci_sync: le_read_features_complete에서의 UAF(Use-After-Free) 수정
이 수정은 hci_conn이 hci_le_read_remote_features_sync 이후이지만 le_read_features_complete 이전에 해제되어 hci_conn_del -> hci_cmd_sync_dequeue가 이를 방지할 수 없었던 경우 발생하는 다음 백트레이스를 수정합니다:
================================================================== BUG: KASAN: slab-use-after-free in instrument_atomic_read_write include/linux/instrumented.h:96 [inline]
BUG: KASAN: slab-use-after-free in atomic_dec_and_test include/linux/atomic/atomic-instrumented.h:1383 [inline]
BUG: KASAN: slab-use-after-free in kobject_put+0x133/0x590 lib/kobject.c:717 Read of size 4 at task 5932's address: 0xffff888103990000 of 16 bytes: hci_conn+0x0/0x100 net/bluetooth/hci_conn.c:38 CPU: 1 PID: 5932 Comm: kworker/u16:1 Not tainted 6.12.0-rc4+ #100 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Workqueue: hci0 hci_rx_work Call Trace: <TASK> dump_stack_lvl+0x185/0x280 lib/dump_stack.c:119 print_report+0xc4a/0x1130 mm/kasan/report.c:614 kasan_report+0x125/0x130 mm/kasan/report.c:780 instrument_atomic_read_write include/linux/instrumented.h:96 [inline]
atomic_dec_and_test include
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