CVE-2026-46138High· 8.1▾ TwilightIn 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 ha…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 44.6 · likelihood 0.1 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.4%
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.
Linux >= a0bfde167b506423111ddb8cd71930497a40fc54 < 6cb7f67bc28da787499291a562d49a084d9c90cdLinux >= a0bfde167b506423111ddb8cd71930497a40fc54 < 22559ad7654f61727fc270ee4893da9f4b70cf17Linux >= a0bfde167b506423111ddb8cd71930497a40fc54 < 77981a507aa0fc001dc37f0dd6631dd2042fed17Linux >= a0bfde167b506423111ddb8cd71930497a40fc54 < 665da0baaf0396f9ed3c86ccb3955dcd0b73e774Linux >= a0bfde167b506423111ddb8cd71930497a40fc54 < 5ddb8014261137cadaf83ab5617a588d80a22586Linux b475c1109251e30ec21fb574d72a1c71a4ab0039Linux 2ccde10127447c1a5caad8469fede945bdb62fdfLinux >= 6.4.16 < 6.5Linux >= 6.5.3 < 6.6Linux 6.6Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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