{"action":"Upgrade xen to 4.20.3+127-gc42374a105-1 or later.","affected":[{"fixed":"4.20.3+127-gc42374a105-1","introduced":"0"}],"component":"xen","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:14","exploited":false,"fixed_versions":["4.20.3+127-gc42374a105-1"],"id":"tcs_01M5NS0MENQQ6K2VNCVRRVAN0X","modified_at":"2026-10-04T22:00:06.677311867Z","published_at":"2026-06-18T14:17:25.297Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-42487","https://security-tracker.debian.org/tracker/CVE-2026-42487"],"severity":{"label":"high","score":7.9},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-42487#Debian:14/xen","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-42487"}],"summary":"HVM guest I/O port accesses are subject to either emulation or at least translation. Translations are managed by the device model (via XEN_DOMCTL_ioport_mapping), and hence the linked list used may ch"}