{"action":"Upgrade xen to 4.8.1-1+deb9u3 or later.","affected":[{"fixed":"4.8.1-1+deb9u3","introduced":"0"}],"component":"xen","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:12","exploited":false,"fixed_versions":["4.8.1-1+deb9u3"],"id":"tcs_01M5NC09S9VJY45S4W7FARAADW","modified_at":"2026-09-01T20:03:42.630903780Z","published_at":"2017-08-15T16:29:00.233Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2017-12855","https://security-tracker.debian.org/tracker/CVE-2017-12855"],"severity":{"label":"medium","score":6.5},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2017-12855","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2017-12855"}],"summary":"Xen maintains the _GTF_{read,writ}ing bits as appropriate, to inform the guest that a grant is in use. A guest is expected not to modify the grant details while it is in use, whereas the guest is free"}