{"action":"Upgrade xorg-server to 2:21.1.7-3+deb12u13 or later.","affected":[{"fixed":"2:21.1.7-3+deb12u13","introduced":"0"}],"component":"xorg-server","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:12","exploited":false,"fixed_versions":["2:21.1.7-3+deb12u13"],"id":"tcs_01M5NSPM3WZ230786149P9M2D9","modified_at":"2026-10-01T03:03:16.701703674Z","published_at":"2026-06-05T12:16:38.907Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-50257","https://security-tracker.debian.org/tracker/CVE-2026-50257"],"severity":{"label":"high","score":7.8},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-50257","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-50257"}],"summary":"A use-after-free flaw was found in the X.Org X server and Xwayland in miSyncDestroyFence(). A client that sets up multiple fence triggers can trigger a use-after-free function pointer call. An attacke"}