{"id":"CVE-2026-23395","revision":null,"records":[{"revision":"b6c0095d232b434b840601c34b89c2ca","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-23395","aliases":[],"title":"Bluetooth: L2CAP: Fix accepting multiple L2CAP_ECRED_CONN_REQ","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: L2CAP: Fix accepting multiple L2CAP_ECRED_CONN_REQ\n\nCurrently the code attempts to accept requests regardless of the\ncommand identifier which may cause multiple requests to be marked\nas pending (FLAG_DEFER_SETUP) which can cause more than\nL2CAP_ECRED_MAX_CID(5) to be allocated in l2cap_ecred_rsp_defer\ncausing an overflow.\n\nThe spec is quite clear that the same identifier shall not be used on\nsubsequent requests:\n\n'Within each signaling channel a different Identifier shall be used\nfor each successive request or indication.'\nhttps://www.bluetooth.com/wp-content/uploads/Files/Specification/HTML/Core-62/out/en/host/logical-link-control-and-adaptation-protocol-specification.html#UUID-32a25a06-4aa4-c6c7-77c5-dcfe3682355d\n\nSo this attempts to check if there are any channels pending with the\nsame identifier and rejects if any are found.","state":0,"publishedAt":"2026-03-25T10:33:18.936+00:00","modifiedAt":"2026-10-19T18:35:42.47+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 \"net/bluetooth/l2cap_core.c\"\n ],\n \"versions\": [\n {\n \"version\": \"15f02b91056253e8cdc592888f431da0731337b8\",\n \"lessThan\": \"10a7a702542240d5edb2b39450ac951c59ccd009\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"15f02b91056253e8cdc592888f431da0731337b8\",\n \"lessThan\": \"46e5b71666fb7652082e4e214a3365f4b14f1dc3\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"15f02b91056253e8cdc592888f431da0731337b8\",\n \"lessThan\": \"fb4a3a26483f3ea2cd21c7a2f7c45d5670600465\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"15f02b91056253e8cdc592888f431da0731337b8\",\n \"lessThan\": \"2124d82fd25e1671bb3ceb37998af5aae5903e06\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"15f02b91056253e8cdc592888f431da0731337b8\",\n \"lessThan\": \"6b949a6b33cbdf621d9fc6f0c48ac00915dbf514\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"15f02b91056253e8cdc592888f431da0731337b8\",\n \"lessThan\": \"8d0d94f8ba5b3a0beec3b0da558b9bea48018117\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"15f02b91056253e8cdc592888f431da0731337b8\",\n \"lessThan\": \"e72ee455297b794b852e5cea8d2d7bb17312172a\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"15f02b91056253e8cdc592888f431da0731337b8\",\n \"lessThan\": \"5b3e2052334f2ff6d5200e952f4aa66994d09899\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\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 \"net/bluetooth/l2cap_core.c\"\n ],\n \"versions\": [\n {\n \"version\": \"5.7\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"5.7\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.10.253\",\n \"lessThanOrEqual\": \"5.10.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.15.203\",\n \"lessThanOrEqual\": \"5.15.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.167\",\n \"lessThanOrEqual\": \"6.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.130\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.78\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.18.20\",\n \"lessThanOrEqual\": \"6.18.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.19.10\",\n \"lessThanOrEqual\": \"6.19.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.0\",\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/10a7a702542240d5edb2b39450ac951c59ccd009","https://git.kernel.org/stable/c/46e5b71666fb7652082e4e214a3365f4b14f1dc3","https://git.kernel.org/stable/c/fb4a3a26483f3ea2cd21c7a2f7c45d5670600465","https://git.kernel.org/stable/c/2124d82fd25e1671bb3ceb37998af5aae5903e06","https://git.kernel.org/stable/c/6b949a6b33cbdf621d9fc6f0c48ac00915dbf514","https://git.kernel.org/stable/c/8d0d94f8ba5b3a0beec3b0da558b9bea48018117","https://git.kernel.org/stable/c/e72ee455297b794b852e5cea8d2d7bb17312172a","https://git.kernel.org/stable/c/5b3e2052334f2ff6d5200e952f4aa66994d09899"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-23395","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-23395","identifiers":["CVE-2026-23395"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all 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