{"action":"Upgrade xorg-server to 2:21.1.7-3+deb12u12 or later.","affected":[{"fixed":"2:21.1.7-3+deb12u12","introduced":"0"}],"component":"xorg-server","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:12","exploited":false,"fixed_versions":["2:21.1.7-3+deb12u12"],"id":"tcs_01M5NRRQYA7HWJHCBVCZMQE8DB","modified_at":"2026-10-01T03:03:23.386210Z","published_at":"2026-04-23T16:16:24.777Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-34001","https://security-tracker.debian.org/tracker/CVE-2026-34001"],"severity":{"label":"high","score":7.8},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-34001","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-34001"}],"summary":"A flaw was found in the X.Org X server. This use-after-free vulnerability occurs in the XSYNC fence triggering logic, specifically within the miSyncTriggerFence() function. An attacker with access to"}