{"action":"Upgrade xen to 4.11.3+24-g14b62ab3e5-1 or later.","affected":[{"fixed":"4.11.3+24-g14b62ab3e5-1","introduced":"0"}],"component":"xen","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:12","exploited":false,"fixed_versions":["4.11.3+24-g14b62ab3e5-1"],"id":"tcs_01M5NE1AN90H22FZMDJC2E6T79","modified_at":"2026-09-21T07:02:31.789439017Z","published_at":"2019-10-31T14:15:10.650Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2019-18420","https://security-tracker.debian.org/tracker/CVE-2019-18420"],"severity":{"label":"medium","score":6.5},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2019-18420","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2019-18420"}],"summary":"An issue was discovered in Xen through 4.12.x allowing x86 PV guest OS users to cause a denial of service via a VCPUOP_initialise hypercall. hypercall_create_continuation() is a variadic function whic"}