{"id":"CVE-2025-68304","revision":null,"records":[{"revision":"739000c310b34750b62507ced3d00b88","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2025-68304","aliases":[],"title":"Bluetooth: hci_core: lookup hci_conn on RX path on protocol side","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_core: lookup hci_conn on RX path on protocol side\n\nThe hdev lock/lookup/unlock/use pattern in the packet RX path doesn't\nensure hci_conn* is not concurrently modified/deleted. This locking\nappears to be leftover from before conn_hash started using RCU\ncommit bf4c63252490b (\"Bluetooth: convert conn hash to RCU\")\nand not clear if it had purpose since then.\n\nCurrently, there are code paths that delete hci_conn* from elsewhere\nthan the ordered hdev->workqueue where the RX work runs in. E.g.\ncommit 5af1f84ed13a (\"Bluetooth: hci_sync: Fix UAF on hci_abort_conn_sync\")\nintroduced some of these, and there probably were a few others before\nit. It's better to do the locking so that even if these run\nconcurrently no UAF is possible.\n\nMove the lookup of hci_conn and associated socket-specific conn to\nprotocol recv handlers, and do them within a single critical section\nto cover hci_conn* usage and lookup.\n\nsyzkaller has reported a crash that appears to be this issue:\n\n [Task hdev->workqueue] [Task 2]\n hci_disconnect_all_sync\n l2cap_recv_acldata(hcon)\n hci_conn_get(hcon)\n hci_abort_conn_sync(hcon)\n hci_dev_lock\n hci_dev_lock\n hci_conn_del(hcon)\n v-------------------------------- hci_dev_unlock\n hci_conn_put(hcon)\n conn = hcon->l2cap_data (UAF)","state":0,"publishedAt":"2025-12-16T15:06:21.887+00:00","modifiedAt":"2026-10-15T22:02:48.882+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"unaffected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"include/net/bluetooth/hci_core.h\",\n \"net/bluetooth/hci_core.c\",\n \"net/bluetooth/iso.c\",\n \"net/bluetooth/l2cap_core.c\",\n \"net/bluetooth/sco.c\"\n ],\n \"versions\": [\n {\n \"version\": \"5af1f84ed13a416297ab9ced7537f4d5ae7f329a\",\n \"lessThan\": \"ec74cdf77310c43b01b83ee898a9bd4b4b0b8e93\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"5af1f84ed13a416297ab9ced7537f4d5ae7f329a\",\n \"lessThan\": \"79a2d4678ba90bdba577dc3af88cc900d6dcd5ee\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"cd55c13bbb3d093ae601aa97e588ed4c1390ebb1\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"4d3ca4a9aaf0aa798a6be372dc0fc3a29e37dd57\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"80265dd1d944c3f33e52375b5dbe654980bd2688\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"6.1.149\",\n \"lessThan\": \"6.2\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.4.16\",\n \"lessThan\": \"6.5\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.5.3\",\n \"lessThan\": \"6.6\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\n }\n ]\n }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"affected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"include/net/bluetooth/hci_core.h\",\n \"net/bluetooth/hci_core.c\",\n \"net/bluetooth/iso.c\",\n \"net/bluetooth/l2cap_core.c\",\n \"net/bluetooth/sco.c\"\n ],\n \"versions\": [\n {\n \"version\": \"6.6\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"6.6\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.17.11\",\n \"lessThanOrEqual\": \"6.17.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.18\",\n \"lessThanOrEqual\": \"*\",\n \"status\": \"unaffected\",\n \"versionType\": \"original_commit_for_fix\"\n }\n ]\n }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":8.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/ec74cdf77310c43b01b83ee898a9bd4b4b0b8e93","https://git.kernel.org/stable/c/79a2d4678ba90bdba577dc3af88cc900d6dcd5ee"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-68304","license":"CVE Program Terms of Use","key":"cve-program:CVE-2025-68304","identifiers":["CVE-2025-68304"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. Missing entries do not establish absence of exploitation.","generation":"2026-11-09T12:02:21.9910047+00:00","complete":true,"records":1769,"lastAttemptAt":"2026-11-09T12:02:21.9910047+00:00","lastSuccessAt":"2026-11-09T12:02:22.1773794+00:00","error":null,"lastVerifiedAt":"2026-11-09T12:02:22.1773831+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"cve-program","scope":"Official CVE Program baseline and cumulative hourly delta; all vendors, published and rejected records","generation":"cve-24e6fde7b744113daefb8f6135035fb8a5c69c9617c9c0d40574a0376532ffd3-bc5670b92e6417137e6d98178f734a585c0efdac3c24cdab996a156ba398735b","complete":true,"records":421397,"lastAttemptAt":"2026-11-09T12:02:16.4943065+00:00","lastSuccessAt":"2026-11-09T12:02:16.4102763+00:00","error":null,"lastVerifiedAt":"2026-11-09T12:02:16.4943065+00:00","snapshotPublishedAt":"2026-11-09T11:21:04+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"euvd","scope":"Rolling EUVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global EUVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-dee6ab404a2646d19baa75eedb007b5a","complete":false,"records":13655,"lastAttemptAt":"2026-11-09T12:06:19.1040242+00:00","lastSuccessAt":"2026-11-09T12:06:19.4347599+00:00","error":null,"lastVerifiedAt":"2026-11-09T12:06:19.4347599+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-11-09T12:02:21.9910047+00:00","complete":true,"records":1096,"lastAttemptAt":"2026-11-09T12:02:21.9910047+00:00","lastSuccessAt":"2026-11-09T12:02:22.1781502+00:00","error":null,"lastVerifiedAt":"2026-11-09T12:02:22.1781508+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-44231a3c29e84c64b271bb4e9b8f3678","complete":true,"records":13667,"lastAttemptAt":"2026-11-09T12:02:23.2886601+00:00","lastSuccessAt":"2026-11-09T12:02:23.284+00:00","error":null,"lastVerifiedAt":"2026-11-09T12:02:23.284+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13707,"expectedIdentifiers":13707,"failedIdentifiers":0},{"source":"osv:Go","scope":"Complete OSV Go ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"go-980593e6977a6d1b4fb1eed5a1ffe88a468736f89f0a06f710924ad59132c023","complete":true,"records":9914,"lastAttemptAt":"2026-11-09T12:02:17.2599038+00:00","lastSuccessAt":"2026-11-08T11:07:07.068788+00:00","error":null,"lastVerifiedAt":"2026-11-09T12:02:17.2599038+00:00","snapshotPublishedAt":"2026-11-08T11:02:46+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:NuGet","scope":"Complete OSV NuGet ecosystem archive, including GitHub Advisory Database records; NuGet version matching only","generation":"nuget-fde804134ecdda0ddd5ff5c26ee1fff5a6fa659311f7ef2e51c6ad54964db0e2","complete":true,"records":1971,"lastAttemptAt":"2026-11-09T12:02:16.7165115+00:00","lastSuccessAt":"2026-11-06T19:03:17.0399903+00:00","error":null,"lastVerifiedAt":"2026-11-09T12:02:16.7165115+00:00","snapshotPublishedAt":"2026-11-06T18:17:57+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:crates.io","scope":"Complete OSV crates.io ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"crates.io-c905fa1bd26c7b261e77cc7202a86dc766ff31c2b096b501f3bf44f561e34970","complete":true,"records":3063,"lastAttemptAt":"2026-11-09T12:02:21.9559708+00:00","lastSuccessAt":"2026-11-09T12:02:21.7931207+00:00","error":null,"lastVerifiedAt":"2026-11-09T12:02:21.9559708+00:00","snapshotPublishedAt":"2026-11-09T11:18:00+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:npm","scope":"Complete OSV npm ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"npm-e6e6ac3eaece246ff08884368fe1dc99d4d393571e77c126c8f4d38d66697688","complete":true,"records":231297,"lastAttemptAt":"2026-11-09T12:02:17.0901763+00:00","lastSuccessAt":"2026-11-09T10:04:27.0059369+00:00","error":null,"lastVerifiedAt":"2026-11-09T12:02:17.0901763+00:00","snapshotPublishedAt":"2026-11-09T09:33:10+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null}]}