{"action":"Upgrade xen to 4.21.1-r4 or later.","affected":[{"fixed":"4.21.1-r4","introduced":"0"}],"component":"xen","cve_ids":[],"ecosystem":"Alpine","ecosystem_qualifier":"Alpine:v3.24","exploited":false,"fixed_versions":["4.21.1-r4"],"id":"tcs_01M5NFDV4PB313892N4DCG17P3","modified_at":"2026-08-27T20:18:25.881432028Z","published_at":"2026-05-15T05:16:33.013Z","references":["https://osv.dev/vulnerability/ALPINE-CVE-2025-54518","https://security.alpinelinux.org/vuln/CVE-2025-54518"],"severity":{"label":"unknown"},"sources":[{"source":"osv","source_id":"ALPINE-CVE-2025-54518#Alpine:v3.24/xen","url":"https://osv.dev/vulnerability/ALPINE-CVE-2025-54518"}],"summary":"Improper isolation of shared resources within the CPU operation cache on Zen 2-based products could allow an attacker to corrupt instructions executed at a different privilege level, potentially resul"}