{"action":"Upgrade xen to 4.9.1-r4 or later.","affected":[{"fixed":"4.9.1-r4","introduced":"0"}],"component":"xen","cve_ids":[],"ecosystem":"Alpine","ecosystem_qualifier":"Alpine:v3.7","exploited":false,"fixed_versions":["4.9.1-r4"],"id":"tcs_01M5NB0A10ZPGMNYMN3Y4AD20R","modified_at":"2026-10-23T17:17:55.296112706Z","published_at":"2018-02-27T19:29:00.607Z","references":["https://osv.dev/vulnerability/ALPINE-CVE-2018-7540","https://security.alpinelinux.org/vuln/CVE-2018-7540"],"severity":{"label":"medium","score":6.5},"sources":[{"source":"osv","source_id":"ALPINE-CVE-2018-7540#Alpine:v3.7/xen","url":"https://osv.dev/vulnerability/ALPINE-CVE-2018-7540"}],"summary":"An issue was discovered in Xen through 4.10.x allowing x86 PV guest OS users to cause a denial of service (host OS CPU hang) via non-preemptable L3/L4 pagetable freeing."}