[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"repo-stars":3,"vuln-DEBIAN-CVE-2025-21969":6},{"stargazers_count":4,"fetched_at":5},7,"2026-06-04T14:53:31.930Z",{"id":7,"descriptions":8,"cisa":9,"weaknesses":10,"exploits":11,"aliases":12,"duplicate_of":9,"upstream":13,"downstream":16,"duplicates":17,"related":18,"reserved_at":9,"published_at":19,"modified_at":20,"state":9,"summary":21,"references_raw":23,"kevs":30,"epss":9,"epss_history":31,"metrics":32,"affected":39},"DEBIAN-CVE-2025-21969","In the Linux kernel, the following vulnerability has been resolved:  Bluetooth: L2CAP: Fix slab-use-after-free Read in l2cap_send_cmd  After the hci sync command releases l2cap_conn, the hci receive data work queue references the released l2cap_conn when sending to the upper layer. Add hci dev lock to the hci receive data work queue to synchronize the two.  [1] BUG: KASAN: slab-use-after-free in l2cap_send_cmd+0x187/0x8d0 net/bluetooth/l2cap_core.c:954 Read of size 8 at addr ffff8880271a4000 by task kworker/u9:2/5837  CPU: 0 UID: 0 PID: 5837 Comm: kworker/u9:2 Not tainted 6.13.0-rc5-syzkaller-00163-gab75170520d4 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Workqueue: hci1 hci_rx_work Call Trace:  \u003CTASK>  __dump_stack lib/dump_stack.c:94 [inline]  dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120  print_address_description mm/kasan/report.c:378 [inline]  print_report+0x169/0x550 mm/kasan/report.c:489  kasan_report+0x143/0x180 mm/kasan/report.c:602  l2cap_build_cmd net/bluetooth/l2cap_core.c:2964 [inline]  l2cap_send_cmd+0x187/0x8d0 net/bluetooth/l2cap_core.c:954  l2cap_sig_send_rej net/bluetooth/l2cap_core.c:5502 [inline]  l2cap_sig_channel net/bluetooth/l2cap_core.c:5538 [inline]  l2cap_recv_frame+0x221f/0x10db0 net/bluetooth/l2cap_core.c:6817  hci_acldata_packet net/bluetooth/hci_core.c:3797 [inline]  hci_rx_work+0x508/0xdb0 net/bluetooth/hci_core.c:4040  process_one_work kernel/workqueue.c:3229 [inline]  process_scheduled_works+0xa66/0x1840 kernel/workqueue.c:3310  worker_thread+0x870/0xd30 kernel/workqueue.c:3391  kthread+0x2f0/0x390 kernel/kthread.c:389  ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147  ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244  \u003C/TASK>  Allocated by task 5837:  kasan_save_stack mm/kasan/common.c:47 [inline]  kasan_save_track+0x3f/0x80 mm/kasan/common.c:68  poison_kmalloc_redzone mm/kasan/common.c:377 [inline]  __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:394  kasan_kmalloc include/linux/kasan.h:260 [inline]  __kmalloc_cache_noprof+0x243/0x390 mm/slub.c:4329  kmalloc_noprof include/linux/slab.h:901 [inline]  kzalloc_noprof include/linux/slab.h:1037 [inline]  l2cap_conn_add+0xa9/0x8e0 net/bluetooth/l2cap_core.c:6860  l2cap_connect_cfm+0x115/0x1090 net/bluetooth/l2cap_core.c:7239  hci_connect_cfm include/net/bluetooth/hci_core.h:2057 [inline]  hci_remote_features_evt+0x68e/0xac0 net/bluetooth/hci_event.c:3726  hci_event_func net/bluetooth/hci_event.c:7473 [inline]  hci_event_packet+0xac2/0x1540 net/bluetooth/hci_event.c:7525  hci_rx_work+0x3f3/0xdb0 net/bluetooth/hci_core.c:4035  process_one_work kernel/workqueue.c:3229 [inline]  process_scheduled_works+0xa66/0x1840 kernel/workqueue.c:3310  worker_thread+0x870/0xd30 kernel/workqueue.c:3391  kthread+0x2f0/0x390 kernel/kthread.c:389  ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147  ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244  Freed by task 54:  kasan_save_stack mm/kasan/common.c:47 [inline]  kasan_save_track+0x3f/0x80 mm/kasan/common.c:68  kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:582  poison_slab_object mm/kasan/common.c:247 [inline]  __kasan_slab_free+0x59/0x70 mm/kasan/common.c:264  kasan_slab_free include/linux/kasan.h:233 [inline]  slab_free_hook mm/slub.c:2353 [inline]  slab_free mm/slub.c:4613 [inline]  kfree+0x196/0x430 mm/slub.c:4761  l2cap_connect_cfm+0xcc/0x1090 net/bluetooth/l2cap_core.c:7235  hci_connect_cfm include/net/bluetooth/hci_core.h:2057 [inline]  hci_conn_failed+0x287/0x400 net/bluetooth/hci_conn.c:1266  hci_abort_conn_sync+0x56c/0x11f0 net/bluetooth/hci_sync.c:5603  hci_cmd_sync_work+0x22b/0x400 net/bluetooth/hci_sync.c:332  process_one_work kernel/workqueue.c:3229 [inline]  process_scheduled_works+0xa66/0x1840 kernel/workqueue.c:3310  worker_thread+0x870/0xd30 kernel/workqueue.c:3391  kthread+0x2f0/0x390 kernel/kthread.c:389  ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147  ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entr ---truncated---",null,[],[],[],[14],{"_key":15},"CVE-2025-21969",[],[],[],"2025-04-01T16:15:28.207Z","2026-04-28T20:29:37.425033Z",{"cisa_kev":22,"cisa_ransomware":22,"cisa_vendor":9,"epss_severity":9,"epss_score":9,"severity":9,"severity_score":9,"severity_version":9,"severity_source":9,"severity_vector":9,"severity_status":9},false,[24],{"url":25,"sources":26,"tags":28},"https://security-tracker.debian.org/tracker/CVE-2025-21969",[27],"osv_debian",[29],"Advisory",[],[],[33],{"source":27,"cvss_v2_0":9,"cvss_v3_0":9,"cvss_v3_1":34,"cvss_v4_0":9},{"baseScore":35,"baseSeverity":9,"vectorString":36,"impactScore":37,"exploitabilityScore":38},7.8,"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",9.8,4.6,[40],{"ecosystem":41,"name":42,"vendor":43,"product":42,"cpe_part":9,"purl_type":44,"purl_namespace":43,"purl_name":42,"source":9,"versions":45},"Debian","linux","debian","deb",[46,50,54],{"version":47,"is_range":48,"range_type":49,"version_start":9,"version_start_type":9,"version_end":9,"version_end_type":9,"fixed_in":9},"all",true,"ecosystem",{"version":51,"is_range":48,"range_type":49,"version_start":9,"version_start_type":9,"version_end":52,"version_end_type":53,"fixed_in":9},"lt6_12_20_1","6.12.20-1","excluding",{"version":51,"is_range":48,"range_type":49,"version_start":9,"version_start_type":9,"version_end":52,"version_end_type":53,"fixed_in":9}]