{"action":"Upgrade xen to 4.20.3+127-gc42374a105-1 or later.","affected":[{"fixed":"4.20.3+127-gc42374a105-1","introduced":"0"}],"component":"xen","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:14","exploited":false,"fixed_versions":["4.20.3+127-gc42374a105-1"],"id":"tcs_01M5NR3XG6M39R3NQW3NFW91Y3","modified_at":"2026-10-15T09:47:35.636210013Z","published_at":"2026-05-19T14:16:38.817Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-23557","https://security-tracker.debian.org/tracker/CVE-2026-23557"],"severity":{"label":"medium","score":6.5},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-23557#Debian:14/xen","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-23557"}],"summary":"Any guest can cause xenstored to crash by issuing a XS_RESET_WATCHES command within a transaction due to an assert() triggering. In case xenstored was built with NDEBUG #defined nothing bad will happe"}