{"id":"DEBIAN-CVE-2026-43322","details":"In the Linux kernel, the following vulnerability has been resolved:  Bluetooth: hci_sync: Fix UAF in le_read_features_complete  This fixes the following backtrace caused by hci_conn being freed before le_read_features_complete but after hci_le_read_remote_features_sync so hci_conn_del -\u003e hci_cmd_sync_dequeue is not able to prevent it:  ================================================================== 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 hci_conn_drop include/net/bluetooth/hci_core.h:1688 [inline] BUG: KASAN: slab-use-after-free in le_read_features_complete+0x5b/0x340 net/bluetooth/hci_sync.c:7344 Write of size 4 at addr ffff8880796b0010 by task kworker/u9:0/52  CPU: 0 UID: 0 PID: 52 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Workqueue: hci0 hci_cmd_sync_work Call Trace:  \u003cTASK\u003e  __dump_stack lib/dump_stack.c:94 [inline]  dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120  print_address_description mm/kasan/report.c:378 [inline]  print_report+0xcd/0x630 mm/kasan/report.c:482  kasan_report+0xe0/0x110 mm/kasan/report.c:595  check_region_inline mm/kasan/generic.c:194 [inline]  kasan_check_range+0x100/0x1b0 mm/kasan/generic.c:200  instrument_atomic_read_write include/linux/instrumented.h:96 [inline]  atomic_dec_and_test include/linux/atomic/atomic-instrumented.h:1383 [inline]  hci_conn_drop include/net/bluetooth/hci_core.h:1688 [inline]  le_read_features_complete+0x5b/0x340 net/bluetooth/hci_sync.c:7344  hci_cmd_sync_work+0x1ff/0x430 net/bluetooth/hci_sync.c:334  process_one_work+0x9ba/0x1b20 kernel/workqueue.c:3257  process_scheduled_works kernel/workqueue.c:3340 [inline]  worker_thread+0x6c8/0xf10 kernel/workqueue.c:3421  kthread+0x3c5/0x780 kernel/kthread.c:463  ret_from_fork+0x983/0xb10 arch/x86/kernel/process.c:158  ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246  \u003c/TASK\u003e  Allocated by task 5932:  kasan_save_stack+0x33/0x60 mm/kasan/common.c:56  kasan_save_track+0x14/0x30 mm/kasan/common.c:77  poison_kmalloc_redzone mm/kasan/common.c:400 [inline]  __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:417  kmalloc_noprof include/linux/slab.h:957 [inline]  kzalloc_noprof include/linux/slab.h:1094 [inline]  __hci_conn_add+0xf8/0x1c70 net/bluetooth/hci_conn.c:963  hci_conn_add_unset+0x76/0x100 net/bluetooth/hci_conn.c:1084  le_conn_complete_evt+0x639/0x1f20 net/bluetooth/hci_event.c:5714  hci_le_enh_conn_complete_evt+0x23d/0x380 net/bluetooth/hci_event.c:5861  hci_le_meta_evt+0x357/0x5e0 net/bluetooth/hci_event.c:7408  hci_event_func net/bluetooth/hci_event.c:7716 [inline]  hci_event_packet+0x685/0x11c0 net/bluetooth/hci_event.c:7773  hci_rx_work+0x2c9/0xeb0 net/bluetooth/hci_core.c:4076  process_one_work+0x9ba/0x1b20 kernel/workqueue.c:3257  process_scheduled_works kernel/workqueue.c:3340 [inline]  worker_thread+0x6c8/0xf10 kernel/workqueue.c:3421  kthread+0x3c5/0x780 kernel/kthread.c:463  ret_from_fork+0x983/0xb10 arch/x86/kernel/process.c:158  ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246  Freed by task 5932:  kasan_save_stack+0x33/0x60 mm/kasan/common.c:56  kasan_save_track+0x14/0x30 mm/kasan/common.c:77  __kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:587  kasan_save_free_info mm/kasan/kasan.h:406 [inline]  poison_slab_object mm/kasan/common.c:252 [inline]  __kasan_slab_free+0x5f/0x80 mm/kasan/common.c:284  kasan_slab_free include/linux/kasan.h:234 [inline]  slab_free_hook mm/slub.c:2540 [inline]  slab_free mm/slub.c:6663 [inline]  kfree+0x2f8/0x6e0 mm/slub.c:6871  device_release+0xa4/0x240 drivers/base/core.c:2565  kobject_cleanup lib/kobject.c:689 [inline]  kobject_release lib/kobject.c:720 [inline]  kref_put include/linux/kref.h:65 [inline]  kobject_put+0x1e7/0x590 lib/kobject. ---truncated---","modified":"2026-08-27T23:06:01.379492944Z","published":"2026-05-08T14:16:40.810Z","upstream":["CVE-2026-43322"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-43322"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.19.12-1"}]}],"versions":["6.12.100-1","6.12.101-1","6.12.105-1","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","6.17.10-1","6.17.11-1","6.17.12-1","6.17.13-1","6.17.13-1~bpo13+1","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","6.17.8-1~bpo13+1","6.17.9-1","6.18.1-1~exp1","6.18.10-1","6.18.12-1","6.18.12-1~bpo13+1","6.18.13-1","6.18.14-1","6.18.15-1","6.18.15-1~bpo13+1","6.18.2-1~exp1","6.18.3-1","6.18.5-1","6.18.5-1~bpo13+1","6.18.8-1","6.18.9-1","6.18.9-1~bpo13+1","6.18~rc4-1~exp1","6.18~rc4-1~exp2","6.18~rc5-1~exp1","6.18~rc6-1~exp1","6.18~rc7-1~exp1","6.19-1~exp1","6.19.10-1","6.19.10-1~bpo13+1","6.19.11-1","6.19.11-1~bpo13+1","6.19.2-1~exp1","6.19.3-1~exp1","6.19.4-1~exp1","6.19.5-1~exp1","6.19.6-1","6.19.6-2","6.19.6-2~bpo13+1","6.19.8-1","6.19.8-1~bpo13+1","6.19~rc4-1~exp1","6.19~rc5-1~exp1","6.19~rc6-1~exp1","6.19~rc7-1~exp1","6.19~rc8-1~exp1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-43322.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}