{"action":"Upgrade h2o to 2.2.5+dfsg2-3 or later.","affected":[{"fixed":"2.2.5+dfsg2-3","introduced":"0"}],"component":"h2o","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:12","exploited":false,"fixed_versions":["2.2.5+dfsg2-3"],"id":"tcs_01M5NED34BV4DDCXAP5TKP5NRB","modified_at":"2026-09-21T07:00:12.460592528Z","published_at":"2019-08-13T21:15:12.287Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2019-9512","https://security-tracker.debian.org/tracker/CVE-2019-9512"],"severity":{"label":"high","score":7.5},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2019-9512","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2019-9512"}],"summary":"Some HTTP/2 implementations are vulnerable to ping floods, potentially leading to a denial of service. The attacker sends continual pings to an HTTP/2 peer, causing the peer to build an internal queue"}