{"action":"Upgrade docker.io to 20.10.3+dfsg1-1 or later.","affected":[{"fixed":"20.10.3+dfsg1-1","introduced":"0"}],"component":"docker.io","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:12","exploited":false,"fixed_versions":["20.10.3+dfsg1-1"],"id":"tcs_01M5NFD9SV0H1RWHNPSYMA0H9P","modified_at":"2026-10-23T18:03:11.268399407Z","published_at":"2021-02-02T18:15:11.827Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2021-21284","https://security-tracker.debian.org/tracker/CVE-2021-21284"],"severity":{"label":"medium","score":6.8},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2021-21284","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2021-21284"}],"summary":"In Docker before versions 9.03.15, 20.10.3 there is a vulnerability involving the --userns-remap option in which access to remapped root allows privilege escalation to real root. When using \"--userns-"}