{"id":"CVE-2025-65494","details":"NULL pointer dereference in get_san_or_cn_from_cert() in src/coap_openssl.c in OISM libcoap 4.3.5 allows remote attackers to cause a denial of service via a crafted X.509 certificate that causes sk_GENERAL_NAME_value() to return NULL.","modified":"2026-08-12T03:51:22.171504209Z","published":"2025-11-24T00:00:00Z","related":["openSUSE-SU-2025:15780-1"],"database_specific":{"cna_assigner":"mitre","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/65xxx/CVE-2025-65494.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/65xxx/CVE-2025-65494.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-65494"},{"type":"REPORT","url":"https://github.com/obgm/libcoap/issues/1745"},{"type":"FIX","url":"https://github.com/obgm/libcoap/pull/1750"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/obgm/libcoap","events":[{"introduced":"851533c3cf63d16984d370ce39d586ecb3694971"},{"last_affected":"851533c3cf63d16984d370ce39d586ecb3694971"}],"database_specific":{"cpe":"cpe:2.3:a:libcoap:libcoap:4.3.5:-:*:*:*:*:*:*","extracted_events":[{"introduced":"4.3.5-NA"},{"last_affected":"4.3.5-NA"}],"source":"CPE_STRING"}}],"versions":["4.3.5-NA","v4.3.5b"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-65494.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}