{"cve":"CVE-2024-31031","nvd":{"published":"2024-04-17T19:15:07.623","modified":"2026-06-17T07:27:42.017","status":"Modified","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-190"],"references":["https://github.com/obgm/libcoap/issues/1351","https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LPENEJBV3KSASIYKNZAKXDAH7Q66KPYG/","https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TUL7QDYFGEIJVO2ZSG4O5HEAWR6PFC52/","https://github.com/obgm/libcoap/issues/1351","https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LPENEJBV3KSASIYKNZAKXDAH7Q66KPYG/"],"products":["fedoraproject:fedora","libcoap:libcoap"],"source":"nvd","synced_at":"2026-10-19T21:49:08.435428910+00:00"},"epss":{"cve":"CVE-2024-31031","score":0.00873,"percentile":0.58926,"date":"2026-11-01"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}