{"action":"Upgrade libx11 to 2:1.6.4-1 or later.","affected":[{"fixed":"2:1.6.4-1","introduced":"0"}],"component":"libx11","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:12","exploited":false,"fixed_versions":["2:1.6.4-1"],"id":"tcs_01M5NBRKHT3EE2PSXZDZGSSVG4","modified_at":"2026-09-22T07:02:33.786826858Z","published_at":"2016-12-13T20:59:07.520Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2016-7943","https://security-tracker.debian.org/tracker/CVE-2016-7943"],"severity":{"label":"critical","score":9.8},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2016-7943","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2016-7943"}],"summary":"The XListFonts function in X.org libX11 before 1.6.4 might allow remote X servers to gain privileges via vectors involving length fields, which trigger out-of-bounds write operations."}