{"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_01M5NVMQFHSHD5M4BTKXAX4RR4","modified_at":"2026-10-23T18:05:44.803431602Z","published_at":"2026-10-13T16:17:23.247Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-79610","https://security-tracker.debian.org/tracker/CVE-2026-79610"],"severity":{"label":"high","score":8.8},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-79610#Debian:13/xen","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-79610"}],"summary":"XSA-501 was about issues with v1 -> v2 and v2 -> v1 changes racing certain other grant table operations. Sadly a v2 -> v1 -> v2 change has yet another effect which wasn't accounted for: During the fir"}