{"action":"Upgrade xen to 4.0.1-2 or later.","affected":[{"fixed":"4.0.1-2","introduced":"0"}],"component":"xen","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:13","exploited":false,"fixed_versions":["4.0.1-2"],"id":"tcs_01M5N9N4H7T3QVHWNJV2YC6R77","modified_at":"2026-10-23T17:47:25.363830093Z","published_at":"2011-01-25T01:00:01.393Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2010-4255","https://security-tracker.debian.org/tracker/CVE-2010-4255"],"severity":{"label":"unknown"},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2010-4255#Debian:13/xen","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2010-4255"}],"summary":"The fixup_page_fault function in arch/x86/traps.c in Xen 4.0.1 and earlier on 64-bit platforms, when paravirtualization is enabled, does not verify that kernel mode is used to call the handle_gdt_ldt_"}