{"id":"CVE-2026-59646","summary":"DTLS handshake reassembler allocates buffer from unchecked 24-bit length","details":"In Bouncy Castle for Java before 1.85, DTLS handshake reassembler allocates buffer from unchecked 24-bit length. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bctls-fips 1.0.24 (1.0.X series), 2.0.24 (2.0.X series) and 2.1.24 (2.1.X series).","modified":"2026-08-05T18:35:10.319747861Z","published":"2026-08-03T00:48:29.386Z","related":["openSUSE-SU-2026:11445-1"],"database_specific":{"cna_assigner":"bcorg","cwe_ids":["CWE-789"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/59xxx/CVE-2026-59646.json","unresolved_ranges":[{"source":"AFFECTED_FIELD","extracted_events":[{"fixed":"1.85"},{"introduced":"1.0.0"},{"fixed":"1.0.24"},{"introduced":"2.0.0"},{"fixed":"2.0.24"},{"introduced":"2.1.0"},{"fixed":"2.1.24"}]}]},"references":[{"type":"WEB","url":"https://www.bouncycastle.org/download/bouncy-castle-java-fips/"},{"type":"WEB","url":"https://www.bouncycastle.org/download/bouncy-castle-java-lts/"},{"type":"WEB","url":"https://www.bouncycastle.org/download/bouncy-castle-java/"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/59xxx/CVE-2026-59646.json"},{"type":"ADVISORY","url":"https://github.com/bcgit/bc-java/wiki/CVE%E2%80%902026%E2%80%9059646"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-59646"},{"type":"FIX","url":"https://github.com/bcgit/bc-java/commit/2d98721e71bbd822ffa0f84e088eea645cf679fa"},{"type":"FIX","url":"https://github.com/bcgit/bc-java/commit/2ea38942c7917f6d7ab4de93d8a5336d021df0d9"},{"type":"PACKAGE","url":"https://github.com/bcgit/bc-java"},{"type":"PACKAGE","url":"https://github.com/bcgit/bc-lts-java"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/bcgit/bc-lts-java","events":[{"introduced":"468b5082f3f0971e80bf9edb7029c17b39b9ba0c"},{"fixed":"f101b232c5d3e07ecdd504210a57e43831d6cd65"}],"database_specific":{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"2.73.0"},{"fixed":"2.73.12"}]}}],"versions":["r2rv73dot11","r2rv73dot10","r2rv73dot9","r2rv73dot8","r2rv73dot6","r2rv73dot4","r2rv73dot3","r2rv73dot1","r2rv73dot0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-59646.json"}}],"schema_version":"1.8.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/U:Amber"}]}