{"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_01M5NP6FZSHD8DAG28B38GMKG0","modified_at":"2026-09-01T20:05:55.880664632Z","published_at":"2025-11-24T14:15:47.643Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2025-65499","https://security-tracker.debian.org/tracker/CVE-2025-65499"],"severity":{"label":"medium","score":4.3},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2025-65499#Debian:13/libcoap3","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2025-65499"}],"summary":"Array index error in tls_verify_call_back() in src/coap_openssl.c in OISM libcoap 4.3.5 allows remote attackers to cause a denial of service via a crafted DTLS handshake that triggers SSL_get_ex_data_"}