CVE-2026-90255
CVE CVE-2026-90255EUVD EUVD-2026-81848Published 2026-09-17T16:07:54.000ZLast changed 2026-09-18T17:54:11.000ZCVSS 8.8
What the advisory describes
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_conn: fix the SCO setup context lifetime hci_setup_sync() queues a conn_handle_t with a NULL destroy callback, so the context is only freed if hci_enhanced_setup_sync() actually runs. An entry that is cancelled instead is leaked, as _hci_cmd_sync_cancel_entry() does not release entry->data when there is no destroy callback, and hci_cmd_sync_clear() cancels every pending entry when the controller is unregistered. The context also stores a bare hci_conn pointer, so the connection can be freed while the work is queued. The dequeue in hci_conn_del() does not cover it either, as it matches on entry->data == conn and entry->data is the wrapper here. Same problem as commit 2f5d635ad590 ("Bluetooth: hci_sync: hold conn in hci_connect_acl/le_sync() callbacks"). Hold the connection and release both from a destroy callback. The submission failure path drops both, since hci_cmd_sync_submit() does not call the destroy callback when it fails to queue.
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Linux — Linux e07a06b4eb417f5271d33ce2240e93c62d98b7b4 <37cfec41365c826d5496ef5d00c9e215eee53aa2; e07a06b4eb417f5271d33ce2240e93c62d98b7b4 <42de40abe25db9211107af8896d0fd741f10648d; 6.1; patch: 0; e07a06b4eb417f5271d33ce2240e93c62d98b7b4 <4d7b1c834d2775b73c65e4888e01f5af8b477fe9; e07a06b4eb417f5271d33ce2240e93c62d98b7b4 <c1fe3c74a89a7749cba3caa0dd91236049c66116; patch: 6.1.188; e07a06b4eb417f5271d33ce2240e93c62d98b7b4 <9a2ba69cebe3fc5a3d4fa8eaaad3c42862723c27; patch: 7.2.6; patch: 6.18.52; e07a06b4eb417f5271d33ce2240e93c62d98b7b4 <a661de0ee29d0915c5e924edf91d2be2b4d35bae; patch: 6.12.110; patch: 7.3-rc1; patch: 6.6.157
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Linux — Linux
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