{"action":"Upgrade xwayland to 2:21.1.4-1 or later.","affected":[{"fixed":"2:21.1.4-1","introduced":"0"}],"component":"xwayland","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:12","exploited":false,"fixed_versions":["2:21.1.4-1"],"id":"tcs_01M5NFYQDMADFSRQT6MVWWCJRE","modified_at":"2026-10-23T18:03:33.049267195Z","published_at":"2021-12-17T17:15:13.417Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2021-4009","https://security-tracker.debian.org/tracker/CVE-2021-4009"],"severity":{"label":"high","score":7.8},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2021-4009#Debian:12/xwayland","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2021-4009"}],"summary":"A flaw was found in xorg-x11-server in versions before 21.1.2 and before 1.20.14. An out-of-bounds access can occur in the SProcXFixesCreatePointerBarrier function. The highest threat from this vulner"}