{"schema":"threatline.record/2","record":{"id":"CVE-2026-98107","aliases":[],"summary":"Bluetooth: L2CAP: fix out-of-bounds write in l2cap_ecred_connect","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: L2CAP: fix out-of-bounds write in l2cap_ecred_connect\n\nl2cap_chan_connect() tries to ensure there are no more than\nL2CAP_ECRED_CONN_SCID_MAX pending ECRED channels, so they fit in the\nsame L2CAP_ECRED_CONN_REQ that l2cap_ecred_connect() constructs.\n\nHowever, the check only counts deferred channels.  If 6 L2CAP sockets\nare connected at the same time in order DDDDND (D=deferred,\nN=non-deferred), the last can bump the total to max+1.  It results to\none __le16 written out of bounds of the scid array, and an invalid\nECRED_CONN_REQ being sent.\n\nFix by leaving room for the non-deferred pending ECRED channels in the\ncounting in l2cap_chan_connect(), so the limit can't be exceeded.\n\nMove counting under same critical section where the channel is added.\nAlthough race conditions involving this appear unreachable, it's easier\nto see.\n\nAlso add WARN_ON_ONCE check in l2cap_ecred_defer_connect() to make this\nless brittle.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98107","source_modified_at":"2026-10-21T12:54:32.791Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"da49b602f7f75ccc91386e1274b3ef71676cd092","lessThan":"fabc5e04f123225daf980d03f2c5a05e7f0f0a7f","status":"affected","versionType":"git"},{"version":"da49b602f7f75ccc91386e1274b3ef71676cd092","lessThan":"ce0927eb3ee2939fab5ce3f9334bfd2fafb38481","status":"affected","versionType":"git"},{"version":"da49b602f7f75ccc91386e1274b3ef71676cd092","lessThan":"6da5c0331fc3ef0c7b8df8269523fc3b2cce1e65","status":"affected","versionType":"git"},{"version":"da49b602f7f75ccc91386e1274b3ef71676cd092","lessThan":"df8c3af6132640da4788e96a02d653e642059803","status":"affected","versionType":"git"},{"version":"da49b602f7f75ccc91386e1274b3ef71676cd092","lessThan":"56c2b5831d39dc84aad2573dc3e197af1a872a05","status":"affected","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98107","source_modified_at":"2026-10-21T12:54:32.791Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"5.7","status":"affected"},{"version":"0","lessThan":"5.7","status":"unaffected","versionType":"semver"},{"version":"6.6.160","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.111","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.53","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.7","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}],"defaultStatus":"affected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98107","source_modified_at":"2026-10-21T12:54:32.791Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"6da5c0331fc3ef0c7b8df8269523fc3b2cce1e65","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98107","source_modified_at":"2026-10-21T12:54:32.791Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"56c2b5831d39dc84aad2573dc3e197af1a872a05","basis":"first unaffected version stated in the CVE record"}],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":0.00168,"percentile":0.05746,"score_date":"2026-10-23"},"published_at":"2026-09-25T10:35:56.340Z","modified_at":"2026-10-21T12:54:32.791Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-98107","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-21T12:54:32.791Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-98107","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://git.kernel.org/stable/c/fabc5e04f123225daf980d03f2c5a05e7f0f0a7f"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/ce0927eb3ee2939fab5ce3f9334bfd2fafb38481"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/6da5c0331fc3ef0c7b8df8269523fc3b2cce1e65"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/df8c3af6132640da4788e96a02d653e642059803"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/56c2b5831d39dc84aad2573dc3e197af1a872a05"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-21T12:54:32.791Z","content_hash":"7a4b37950debe6c450b4e74bc5238d44836891b0c085222fbc0c704841bc917e"}}