{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-23395","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-01-13T15:37:46.011Z","datePublished":"2026-03-25T10:33:18.936Z","dateUpdated":"2026-05-11T22:06:04.800Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T22:06:04.800Z"},"descriptions":[{"lang":"en","value":"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."}],"metrics":[{"cvssV3_1":{"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"}}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/bluetooth/l2cap_core.c"],"versions":[{"version":"15f02b91056253e8cdc592888f431da0731337b8","lessThan":"10a7a702542240d5edb2b39450ac951c59ccd009","status":"affected","versionType":"git"},{"version":"15f02b91056253e8cdc592888f431da0731337b8","lessThan":"46e5b71666fb7652082e4e214a3365f4b14f1dc3","status":"affected","versionType":"git"},{"version":"15f02b91056253e8cdc592888f431da0731337b8","lessThan":"fb4a3a26483f3ea2cd21c7a2f7c45d5670600465","status":"affected","versionType":"git"},{"version":"15f02b91056253e8cdc592888f431da0731337b8","lessThan":"2124d82fd25e1671bb3ceb37998af5aae5903e06","status":"affected","versionType":"git"},{"version":"15f02b91056253e8cdc592888f431da0731337b8","lessThan":"6b949a6b33cbdf621d9fc6f0c48ac00915dbf514","status":"affected","versionType":"git"},{"version":"15f02b91056253e8cdc592888f431da0731337b8","lessThan":"8d0d94f8ba5b3a0beec3b0da558b9bea48018117","status":"affected","versionType":"git"},{"version":"15f02b91056253e8cdc592888f431da0731337b8","lessThan":"e72ee455297b794b852e5cea8d2d7bb17312172a","status":"affected","versionType":"git"},{"version":"15f02b91056253e8cdc592888f431da0731337b8","lessThan":"5b3e2052334f2ff6d5200e952f4aa66994d09899","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/bluetooth/l2cap_core.c"],"versions":[{"version":"5.7","status":"affected"},{"version":"0","lessThan":"5.7","status":"unaffected","versionType":"semver"},{"version":"5.10.253","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.203","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.167","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.130","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.78","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.20","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"6.19.10","lessThanOrEqual":"6.19.*","status":"unaffected","versionType":"semver"},{"version":"7.0","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"5.10.253"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"5.15.203"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"6.1.167"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"6.6.130"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"6.12.78"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"6.18.20"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"6.19.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"7.0"}]}]}],"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"}}}}