{"action":"Upgrade xen to 4.20.4+39-gf1e1321c87-1 or later.","affected":[{"fixed":"4.20.4+39-gf1e1321c87-1","introduced":"0"}],"component":"xen","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:14","exploited":false,"fixed_versions":["4.20.4+39-gf1e1321c87-1"],"id":"tcs_01M5NVMP74YAN1D4ZFASFQ44XQ","modified_at":"2026-10-23T18:05:44.804109097Z","published_at":"2026-10-13T16:17:23.040Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-79608","https://security-tracker.debian.org/tracker/CVE-2026-79608"],"severity":{"label":"critical","score":9.8},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-79608#Debian:14/xen","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-79608"}],"summary":"The workaround for XSA-433 (Zenbleed, CVE-2023-20593) was later re-worked to better integrate with other manipulations of the same MSR. In this rework an inverted conditional was introduced, resulting"}