{"action":"Upgrade xen to 4.20.4+39-gf1e1321c87-0+deb13u1 or later.","affected":[{"fixed":"4.20.4+39-gf1e1321c87-0+deb13u1","introduced":"0"}],"component":"xen","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:13","exploited":false,"fixed_versions":["4.20.4+39-gf1e1321c87-0+deb13u1"],"id":"tcs_01M5NVMMZK0QFYN1Q3M5C0WG9R","modified_at":"2026-10-21T23:00:09.176566118Z","published_at":"2026-09-08T13:17:27.253Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-79603","https://security-tracker.debian.org/tracker/CVE-2026-79603"],"severity":{"label":"medium","score":4.3},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-79603#Debian:13/xen","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-79603"}],"summary":"x86 PV guests can free memory pages while still keeping a stale TLB entry pointing to them. A TLB flush is only issued by Xen (if needed) when the page is re-used. Since it's possible for the page to"}