CVE-2026-46138 (GCVE-0-2026-46138)
Vulnerability from cvelistv5
Published
2026-05-28 09:35
Modified
2026-10-19 19:36
Severity ?
8.1 (High) - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_event: Fix OOB read and infinite loop in hci_le_create_big_complete_evt hci_le_create_big_complete_evt() iterates over BT_BOUND connections for a BIG handle using a while loop, accessing ev->bis_handle[i++] on each iteration. However, there is no check that i stays within ev->num_bis before the array access. When a controller sends a LE_Create_BIG_Complete event with fewer bis_handle entries than there are BT_BOUND connections for that BIG, or with num_bis=0, the loop reads beyond the valid bis_handle[] flex array into adjacent heap memory. Since the out-of-bounds values typically exceed HCI_CONN_HANDLE_MAX (0x0EFF), hci_conn_set_handle() rejects them and the connection remains in BT_BOUND state. The same connection is then found again by hci_conn_hash_lookup_big_state(), creating an infinite loop with hci_dev_lock held. Fix this by terminating the BIG if in case not all BIS could be setup properly.
References
Impacted products
Vendor Product Version
Linux Linux Version: a0bfde167b506423111ddb8cd71930497a40fc54
Version: a0bfde167b506423111ddb8cd71930497a40fc54
Version: a0bfde167b506423111ddb8cd71930497a40fc54
Version: a0bfde167b506423111ddb8cd71930497a40fc54
Version: a0bfde167b506423111ddb8cd71930497a40fc54
Version: b475c1109251e30ec21fb574d72a1c71a4ab0039
Version: 2ccde10127447c1a5caad8469fede945bdb62fdf
Version: 6.4.16   ≤
Version: 6.5.3   ≤
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