{"action":"Upgrade xwayland to 2:24.1.12-1 or later.","affected":[{"fixed":"2:24.1.12-1","introduced":"0"}],"component":"xwayland","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:14","exploited":false,"fixed_versions":["2:24.1.12-1"],"id":"tcs_01M5NSPQQQ77X8D0GXC0MKS8NH","modified_at":"2026-10-01T03:03:24.794749077Z","published_at":"2026-06-05T12:16:39.617Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-50261","https://security-tracker.debian.org/tracker/CVE-2026-50261"],"severity":{"label":"high","score":7.8},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-50261#Debian:14/xwayland","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-50261"}],"summary":"A use-after-free flaw was found in the X.Org X server and Xwayland in SyncChangeCounter(). A client that sets up multiple SyncCounters can trigger a use-after-free when destroying those counters via a"}