{"action":"Upgrade unbound to 1.9.4-r0 or later.","affected":[{"fixed":"1.9.4-r0","introduced":"0"}],"component":"unbound","cve_ids":[],"ecosystem":"Alpine","ecosystem_qualifier":"Alpine:v3.22","exploited":false,"fixed_versions":["1.9.4-r0"],"id":"tcs_01M5NBFS2ZXCRQ9CJC9BS2BEXZ","modified_at":"2026-09-21T06:17:52.496310149Z","published_at":"2019-10-03T19:15:09.550Z","references":["https://osv.dev/vulnerability/ALPINE-CVE-2019-16866","https://security.alpinelinux.org/vuln/CVE-2019-16866"],"severity":{"label":"high","score":7.5},"sources":[{"source":"osv","source_id":"ALPINE-CVE-2019-16866#Alpine:v3.22/unbound","url":"https://osv.dev/vulnerability/ALPINE-CVE-2019-16866"}],"summary":"Unbound before 1.9.4 accesses uninitialized memory, which allows remote attackers to trigger a crash via a crafted NOTIFY query. The source IP address of the query must match an access-control rule."}