CVE-2026-90254
CVE CVE-2026-90254EUVD EUVD-2026-81847Published 2026-09-17T16:07:54.000Z
What the advisory describes
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_sync: free the advertising instance on the failure and cancel paths adv_timeout_expire() hands a kmalloc()ed instance byte to hci_cmd_sync_queue() with a NULL destroy callback, and only adv_timeout_expire_sync() frees it. That leaks on two paths: - the return value is not checked, and hci_cmd_sync_queue() does not take ownership when it fails (-ENETDOWN, -ENODEV, -ENOMEM); - a cancelled entry is not released, as _hci_cmd_sync_cancel_entry() does not free entry->data when there is no destroy callback. hci_cmd_sync_clear() cancels every pending entry when the controller is unregistered. Free the buffer from a destroy callback, and in the caller when the entry could not be queued at all.
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 c249ea9b4309cf3250c5bbb42a05d38d0ed9071c <193182c6467f508a8a61d5db506d796ffed6eee6; patch: 7.3-rc1; 6.1; c249ea9b4309cf3250c5bbb42a05d38d0ed9071c <9c3b6c1413bd0b4993642d987616331f84d9b7f5; patch: 6.1.188; patch: 0; patch: 6.18.52; c249ea9b4309cf3250c5bbb42a05d38d0ed9071c <2e3d827cd56865c14f6ca118bbccd7801091fb21; c249ea9b4309cf3250c5bbb42a05d38d0ed9071c <c2019224a766245b7db39d87fdfe84c3fdc879d9; patch: 6.12.110; c249ea9b4309cf3250c5bbb42a05d38d0ed9071c <bb5ca1cc7744c41c59002bd6523714a685ae6595; c249ea9b4309cf3250c5bbb42a05d38d0ed9071c <120d8dc042e3d45073bb6e50ee7b058a0b182627; patch: 6.6.157; patch: 7.2.6
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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