{"action":"Upgrade wolfssl to 4.2.0+dfsg-3 or later.","affected":[{"fixed":"4.2.0+dfsg-3","introduced":"0"}],"component":"wolfssl","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:13","exploited":false,"fixed_versions":["4.2.0+dfsg-3"],"id":"tcs_01M5NE1QFFSHB9V63TDEF3EVSG","modified_at":"2026-09-21T07:01:54.421583154Z","published_at":"2019-11-09T13:15:10.227Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2019-18840","https://security-tracker.debian.org/tracker/CVE-2019-18840"],"severity":{"label":"high","score":7.5},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2019-18840#Debian:13/wolfssl","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2019-18840"}],"summary":"In wolfSSL 4.1.0 through 4.2.0c, there are missing sanity checks of memory accesses in parsing ASN.1 certificate data while handshaking. Specifically, there is a one-byte heap-based buffer overflow in"}