{"action":"Upgrade xen to 4.20.3+127-gc42374a105-0+deb13u1 or later.","affected":[{"fixed":"4.20.3+127-gc42374a105-0+deb13u1","introduced":"0"}],"component":"xen","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:13","exploited":false,"fixed_versions":["4.20.3+127-gc42374a105-0+deb13u1"],"id":"tcs_01M5NS0MNNE9XCTX8PFTSXT8T8","modified_at":"2026-10-04T22:00:06.671074031Z","published_at":"2026-06-18T14:17:25.410Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-42488","https://security-tracker.debian.org/tracker/CVE-2026-42488"],"severity":{"label":"high","score":8.1},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-42488#Debian:13/xen","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-42488"}],"summary":"Some shadow paging errors paths will switch the page-tables without updating the currently running vCPU reference. This causes a mismatch between the loaded page-tables and the mapcache metadata which"}