{"id":"CVE-2026-46138","summary":"Bluetooth: hci_event: Fix OOB read and infinite loop in hci_le_create_big_complete_evt","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_event: Fix OOB read and infinite loop in hci_le_create_big_complete_evt\n\nhci_le_create_big_complete_evt() iterates over BT_BOUND connections for\na BIG handle using a while loop, accessing ev-\u003ebis_handle[i++] on each\niteration.  However, there is no check that i stays within ev-\u003enum_bis\nbefore the array access.\n\nWhen a controller sends a LE_Create_BIG_Complete event with fewer\nbis_handle entries than there are BT_BOUND connections for that BIG,\nor with num_bis=0, the loop reads beyond the valid bis_handle[] flex\narray into adjacent heap memory.  Since the out-of-bounds values\ntypically exceed HCI_CONN_HANDLE_MAX (0x0EFF), hci_conn_set_handle()\nrejects them and the connection remains in BT_BOUND state.  The same\nconnection is then found again by hci_conn_hash_lookup_big_state(),\ncreating an infinite loop with hci_dev_lock held.\n\nFix this by terminating the BIG if in case not all BIS could be setup\nproperly.","modified":"2026-10-28T02:30:40.024595915Z","published":"2026-05-28T09:35:54.467Z","related":["SUSE-SU-2026:23066-1","SUSE-SU-2026:23068-1","SUSE-SU-2026:23193-1","SUSE-SU-2026:23194-1","SUSE-SU-2026:23221-1","SUSE-SU-2026:23231-1","SUSE-SU-2026:23237-1","SUSE-SU-2026:23241-1","SUSE-SU-2026:23244-1","SUSE-SU-2026:3130-1","SUSE-SU-2026:3166-1","openSUSE-SU-2026:10954-1","openSUSE-SU-2026:21555-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46138.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/22559ad7654f61727fc270ee4893da9f4b70cf17"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5ddb8014261137cadaf83ab5617a588d80a22586"},{"type":"WEB","url":"https://git.kernel.org/stable/c/665da0baaf0396f9ed3c86ccb3955dcd0b73e774"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6cb7f67bc28da787499291a562d49a084d9c90cd"},{"type":"WEB","url":"https://git.kernel.org/stable/c/77981a507aa0fc001dc37f0dd6631dd2042fed17"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46138.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-46138"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"a0bfde167b506423111ddb8cd71930497a40fc54"},{"fixed":"6cb7f67bc28da787499291a562d49a084d9c90cd"},{"fixed":"22559ad7654f61727fc270ee4893da9f4b70cf17"},{"fixed":"77981a507aa0fc001dc37f0dd6631dd2042fed17"},{"fixed":"665da0baaf0396f9ed3c86ccb3955dcd0b73e774"},{"fixed":"5ddb8014261137cadaf83ab5617a588d80a22586"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"6.4.16"},{"fixed":"6.5"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"6.5.3"},{"fixed":"6.6"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"b475c1109251e30ec21fb574d72a1c71a4ab0039"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"2ccde10127447c1a5caad8469fede945bdb62fdf"}]}],"versions":["v6.4.16","v6.5.13","v6.5.12","v6.5.11","v6.5.10","v6.5.9","v6.5.8","v6.5.7","v6.5.6","v6.5.5","v6.5.4","v6.5.3"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-46138.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.6.0"},{"fixed":"6.6.140"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.88"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.30"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.0.7"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-46138.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H"}]}