{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2023-54164", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2023-54164", "idYear": 2023, "status": "PUBLISHED", "publishedAt": "2025-12-30T12:08:40.357Z", "updatedAt": "2026-10-15T21:41:40.592Z", "importedAt": "2026-10-24T01:57:03.413Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "Bluetooth: ISO: fix iso_conn related locking and validity issues", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: ISO: fix iso_conn related locking and validity issues\n\nsk->sk_state indicates whether iso_pi(sk)->conn is valid. Operations\nthat check/update sk_state and access conn should hold lock_sock,\notherwise they can race.\n\nThe order of taking locks is hci_dev_lock > lock_sock > iso_conn_lock,\nwhich is how it is in connect/disconnect_cfm -> iso_conn_del ->\niso_chan_del.\n\nFix locking in iso_connect_cis/bis and sendmsg/recvmsg to take lock_sock\naround updating sk_state and conn.\n\niso_conn_del must not occur during iso_connect_cis/bis, as it frees the\niso_conn. Hold hdev->lock longer to prevent that.\n\nThis should not reintroduce the issue fixed in commit 241f51931c35\n(\"Bluetooth: ISO: Avoid circular locking dependency\"), since the we\nacquire locks in order. We retain the fix in iso_sock_connect to release\nlock_sock before iso_connect_* acquires hdev->lock.\n\nSimilarly for commit 6a5ad251b7cd (\"Bluetooth: ISO: Fix possible\ncircular locking dependency\"). We retain the fix in iso_conn_ready to\nnot acquire iso_conn_lock before lock_sock.\n\niso_conn_add shall return iso_conn with valid hcon. Make it so also when\nreusing an old CIS connection waiting for disconnect timeout (see\n__iso_sock_close where conn->hcon is set to NULL).\n\nTrace with iso_conn_del after iso_chan_add in iso_connect_cis:\n===============================================================\niso_sock_create:771: sock 00000000be9b69b7\niso_sock_init:693: sk 000000004dff667e\niso_sock_bind:827: sk 000000004dff667e 70:1a:b8:98:ff:a2 type 1\niso_sock_setsockopt:1289: sk 000000004dff667e\niso_sock_setsockopt:1289: sk 000000004dff667e\niso_sock_setsockopt:1289: sk 000000004dff667e\niso_sock_connect:875: sk 000000004dff667e\niso_connect_cis:353: 70:1a:b8:98:ff:a2 -> 28:3d:c2:4a:7e:da\nhci_get_route:1199: 70:1a:b8:98:ff:a2 -> 28:3d:c2:4a:7e:da\nhci_conn_add:1005: hci0 dst 28:3d:c2:4a:7e:da\niso_conn_add:140: hcon 000000007b65d182 conn 00000000daf8625e\n__iso_chan_add:214: conn 00000000daf8625e\niso_connect_cfm:1700: hcon 000000007b65d182 bdaddr 28:3d:c2:4a:7e:da status 12\niso_conn_del:187: hcon 000000007b65d182 conn 00000000daf8625e, err 16\niso_sock_clear_timer:117: sock 000000004dff667e state 3\n \niso_chan_del:153: sk 000000004dff667e, conn 00000000daf8625e, err 16\nhci_conn_del:1151: hci0 hcon 000000007b65d182 handle 65535\nhci_conn_unlink:1102: hci0: hcon 000000007b65d182\nhci_chan_list_flush:2780: hcon 000000007b65d182\niso_sock_getsockopt:1376: sk 000000004dff667e\niso_sock_getname:1070: sock 00000000be9b69b7, sk 000000004dff667e\niso_sock_getname:1070: sock 00000000be9b69b7, sk 000000004dff667e\niso_sock_getsockopt:1376: sk 000000004dff667e\niso_sock_getname:1070: sock 00000000be9b69b7, sk 000000004dff667e\niso_sock_getname:1070: sock 00000000be9b69b7, sk 000000004dff667e\niso_sock_shutdown:1434: sock 00000000be9b69b7, sk 000000004dff667e, how 1\n__iso_sock_close:632: sk 000000004dff667e state 5 socket 00000000be9b69b7\n \nBUG: kernel NULL pointer dereference, address: 0000000000000000\nPGD 8000000006467067 P4D 8000000006467067 PUD 3f5f067 PMD 0\nOops: 0000 [#1] PREEMPT SMP PTI\nHardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-1.fc38 04/01/2014\nRIP: 0010:__iso_sock_close (net/bluetooth/iso.c:664) bluetooth\n===============================================================\n\nTrace with iso_conn_del before iso_chan_add in iso_connect_cis:\n===============================================================\niso_connect_cis:356: 70:1a:b8:98:ff:a2 -> 28:3d:c2:4a:7e:da\n...\niso_conn_add:140: hcon 0000000093bc551f conn 00000000768ae504\nhci_dev_put:1487: hci0 orig refcnt 21\nhci_event_packet:7607: hci0: e\n---truncated---", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "c524f9561c657b8af26dd4f67092b8928261aa62", "status": "affected", "versionType": "git", "lessThan": "e969bfed84c1f88dc722a678ee08488e86f0ec1a" }, { "version": "241f51931c35085449502c10f64fb3ecd6e02171", "status": "affected", "versionType": "git", "lessThan": "88ad50f2b843a510bd7c922c0a4e2484aff9d645" }, { "version": "241f51931c35085449502c10f64fb3ecd6e02171", "status": "affected", "versionType": "git", "lessThan": "d40ae85ee62e3666f45bc61864b22121346f88ef" }, { "version": "2539cbc625c560d5432e2f0fc04bfe4a889cf737", "status": "affected", "versionType": "git" }, { "version": "6.1.9", "status": "affected", "versionType": "semver", "lessThan": "6.1.42" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "6.2", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "6.2" }, { "version": "6.1.42", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.4.7", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.4.*" }, { "version": "6.5", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }