{"action":"Upgrade xen to 4.13.1-r4 or later.","affected":[{"fixed":"4.13.1-r4","introduced":"0"}],"component":"xen","cve_ids":[],"ecosystem":"Alpine","ecosystem_qualifier":"Alpine:v3.12","exploited":false,"fixed_versions":["4.13.1-r4"],"id":"tcs_01M5NCF23SXWW1VAQHDNW4ZKA3","modified_at":"2026-10-26T11:17:55.153972272Z","published_at":"2020-09-23T22:15:13.853Z","references":["https://osv.dev/vulnerability/ALPINE-CVE-2020-25603","https://security.alpinelinux.org/vuln/CVE-2020-25603"],"severity":{"label":"high","score":7.8},"sources":[{"source":"osv","source_id":"ALPINE-CVE-2020-25603#Alpine:v3.12/xen","url":"https://osv.dev/vulnerability/ALPINE-CVE-2020-25603"}],"summary":"An issue was discovered in Xen through 4.14.x. There are missing memory barriers when accessing/allocating an event channel. Event channels control structures can be accessed lockless as long as the p"}