{"api_version":"1","generated_at":"2026-04-19T01:15:03+00:00","cve":"CVE-2026-23395","urls":{"html":"https://cve.report/CVE-2026-23395","api":"https://cve.report/api/cve/CVE-2026-23395.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-23395","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-23395"},"summary":{"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":"PUBLISHED","assigner":"Linux","published_at":"2026-03-25 11:16:40","updated_at":"2026-04-18 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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."}],"metrics":[{"cvssV3_1":{"baseScore":8.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"providerMetadata":{"dateUpdated":"2026-04-18T08:58:29.622Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/10a7a702542240d5edb2b39450ac951c59ccd009"},{"url":"https://git.kernel.org/stable/c/46e5b71666fb7652082e4e214a3365f4b14f1dc3"},{"url":"https://git.kernel.org/stable/c/fb4a3a26483f3ea2cd21c7a2f7c45d5670600465"},{"url":"https://git.kernel.org/stable/c/2124d82fd25e1671bb3ceb37998af5aae5903e06"},{"url":"https://git.kernel.org/stable/c/6b949a6b33cbdf621d9fc6f0c48ac00915dbf514"},{"url":"https://git.kernel.org/stable/c/8d0d94f8ba5b3a0beec3b0da558b9bea48018117"},{"url":"https://git.kernel.org/stable/c/e72ee455297b794b852e5cea8d2d7bb17312172a"},{"url":"https://git.kernel.org/stable/c/5b3e2052334f2ff6d5200e952f4aa66994d09899"}],"title":"Bluetooth: L2CAP: Fix accepting multiple L2CAP_ECRED_CONN_REQ","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-23395","datePublished":"2026-03-25T10:33:18.936Z","dateReserved":"2026-01-13T15:37:46.011Z","dateUpdated":"2026-04-18T08:58:29.622Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-03-25 11:16:40","lastModifiedDate":"2026-04-18 09:16:23","problem_types":[],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":8.8,"baseSeverity":"HIGH","attackVector":"ADJACENT_NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":2.8,"impactScore":5.9}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"23395","Ordinal":"1","Title":"Bluetooth: L2CAP: Fix accepting multiple L2CAP_ECRED_CONN_REQ","CVE":"CVE-2026-23395","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"23395","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"Bluetooth: L2CAP: Fix accepting multiple L2CAP_ECRED_CONN_REQ"}]}}}