{"action":"Upgrade xorg-server to 2:21.1.24-1 or later.","affected":[{"fixed":"2:21.1.24-1","introduced":"0"}],"component":"xorg-server","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:14","exploited":false,"fixed_versions":["2:21.1.24-1"],"id":"tcs_01M5NT14MAA6SZDGSC9QRHVWY5","modified_at":"2026-10-01T03:03:27.026620963Z","published_at":"2026-07-08T09:16:29.800Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-55999","https://security-tracker.debian.org/tracker/CVE-2026-55999"],"severity":{"label":"high","score":7.8},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-55999#Debian:14/xorg-server","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-55999"}],"summary":"Local attackers with a X connection able to provide PCX fonts to the X server xorg-server before 21.2.24 and xwayland before 24.1.13 could cause a heap buffer overflow via SetFont due to missing glyph"}