{"id":"DEBIAN-CVE-2026-68394","details":"In the Linux kernel, the following vulnerability has been resolved:  Bluetooth: MGMT: revalidate LOAD_CONN_PARAM queued update  MGMT_OP_LOAD_CONN_PARAM queues conn_update_sync() when a single parameter update changes an existing LE central connection. The queued work currently stores a borrowed hci_conn_params entry from hdev-\u003ele_conn_params. A later LOAD_CONN_PARAM request can clear disabled parameters and free that entry before hci_cmd_sync_work() runs the queued callback.  Do not keep the borrowed hci_conn_params pointer in queued work. Queue the hci_conn instead and hold a reference until the queued callback completes. When the work runs, revalidate that the connection is still present, look up the current hci_conn_params entry, and cancel the update if userspace removed that entry while the work was pending.  Copy the interval values from the current params entry under hdev-\u003elock, then drop the lock and keep using hci_le_conn_update_sync() to issue the update.  Validation reproduced this kernel report: BUG: KASAN: slab-use-after-free in conn_update_sync+0x2a/0xf0 [bluetooth] Read of size 1 at addr ffff88810c697126 by task kworker/u17:0/377 Workqueue: hci0 hci_cmd_sync_work [bluetooth]  Call Trace:  \u003cTASK\u003e  dump_stack_lvl+0x66/0xa0  print_report+0xce/0x5f0  kasan_report+0xe0/0x110  conn_update_sync+0x2a/0xf0 [bluetooth]  hci_cmd_sync_work+0x187/0x210 [bluetooth]  process_one_work+0x4fd/0xbc0  worker_thread+0x2d8/0x570  kthread+0x1ad/0x1f0  ret_from_fork+0x3c9/0x540  ret_from_fork_asm+0x1a/0x30  Allocated by task 466:  hci_conn_params_add+0xa6/0x240 [bluetooth]  load_conn_param+0x4e1/0x850 [bluetooth]  hci_sock_sendmsg+0x96b/0xf80 [bluetooth]  Freed by task 474:  kfree+0x313/0x590  hci_conn_params_clear_disabled+0x9b/0xc0 [bluetooth]  load_conn_param+0x4bf/0x850 [bluetooth]  hci_sock_sendmsg+0x96b/0xf80 [bluetooth]","modified":"2026-08-27T23:06:31.909433939Z","published":"2026-08-10T13:20:32.773Z","upstream":["CVE-2026-68394"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-68394"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.12.101-1"}]}],"versions":["6.12.100-1","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"],"ecosystem_specific":{"urgency":"not yet 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