{"id":"AZL-113221","summary":"CVE-2026-123596 affecting package netavark 1.10.3-9","details":"Hickory DNS hickory-proto through 0.26.0-alpha.1 and hickory-net 0.26.0-beta.1 before 0.26.2 contain a DNSSEC validation flaw in the validating recursor's NSEC handler that accepts parent-side ancestor-delegation NSEC records as proof of nonexistence for names below the zone cut. An on-path attacker, rogue parent nameserver, or attacker winning a port and TXID race can deliver one forged NXDOMAIN response built from genuinely signed parent NSEC records, causing authenticated denial of existing child-zone names cached for the negative TTL.","modified":"2026-11-14T05:30:17Z","published":"2026-11-08T02:16:54Z","upstream":["CVE-2026-123596"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-123596"}],"affected":[{"package":{"name":"netavark","ecosystem":"Azure Linux:3","purl":"pkg:rpm/azure-linux/netavark"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"1.10.3-9"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-113221.json"}}],"schema_version":"1.9.2"}