{"id":"CVE-2024-31031","details":"An issue in `coap_pdu.c` in libcoap 4.3.4 allows attackers to cause undefined behavior via a sequence of messages leading to unsigned integer overflow.","modified":"2026-04-10T05:12:24.777125Z","published":"2024-04-17T19:15:07.623Z","references":[{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LPENEJBV3KSASIYKNZAKXDAH7Q66KPYG/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TUL7QDYFGEIJVO2ZSG4O5HEAWR6PFC52/"},{"type":"ADVISORY","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LPENEJBV3KSASIYKNZAKXDAH7Q66KPYG/"},{"type":"ADVISORY","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TUL7QDYFGEIJVO2ZSG4O5HEAWR6PFC52/"},{"type":"REPORT","url":"https://github.com/obgm/libcoap/issues/1351"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/obgm/libcoap","events":[{"introduced":"0"},{"last_affected":"f6a9d52ccf791060fd8233d85ba9d87878de6e04"}],"database_specific":{"versions":[{"introduced":"0"},{"last_affected":"4.3.4"}]}}],"versions":["coap-lwip","v4.1.1","v4.1.2","v4.2.0","v4.2.0-rc1","v4.2.0-rc2","v4.2.0-rc3","v4.2.0-rc4","v4.2.1","v4.3.2","v4.3.2-rc1","v4.3.2-rc2","v4.3.3","v4.3.4","v4.3.4a","v4_1_1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-31031.json","unresolved_ranges":[{"events":[{"introduced":"0"},{"last_affected":"39"}]},{"events":[{"introduced":"0"},{"last_affected":"40"}]}]}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}