{"action":"Upgrade gnutls28 to 3.7.3-2 or later.","affected":[{"fixed":"3.7.3-2","introduced":"0"}],"component":"gnutls28","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:13","exploited":false,"fixed_versions":["3.7.3-2"],"id":"tcs_01M5NG0P4CZM5HD3WJWGGQBWV7","modified_at":"2026-10-15T09:47:36.379239138Z","published_at":"2022-08-24T16:15:09.927Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2021-4209","https://security-tracker.debian.org/tracker/CVE-2021-4209"],"severity":{"label":"medium","score":6.5},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2021-4209#Debian:13/gnutls28","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2021-4209"}],"summary":"A NULL pointer dereference flaw was found in GnuTLS. As Nettle's hash update functions internally call memcpy, providing zero-length input may cause undefined behavior. This flaw leads to a denial of"}