{"action":"Upgrade libcoap3 to 4.3.4-1.1+deb13u2 or later.","affected":[{"fixed":"4.3.4-1.1+deb13u2","introduced":"0"}],"component":"libcoap3","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:13","exploited":false,"fixed_versions":["4.3.4-1.1+deb13u2"],"id":"tcs_01M5NP6E98C9VYD4S07WM4SVJ6","modified_at":"2026-09-01T20:05:55.819534106Z","published_at":"2025-11-24T14:15:46.910Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2025-65494","https://security-tracker.debian.org/tracker/CVE-2025-65494"],"severity":{"label":"high","score":7.5},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2025-65494#Debian:13/libcoap3","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2025-65494"}],"summary":"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_GE"}