{"id":"AZL-85728","summary":"CVE-2026-32934 affecting package coredns for versions less than 1.11.4-17","details":"CoreDNS is a DNS server that chains plugins. In versions prior to 1.14.3, the DNS-over-QUIC (DoQ) server can be driven into unbounded goroutine and memory growth by a remote client that opens many QUIC streams and sends only 1 byte per stream. When the worker pool is full, CoreDNS still spawns a goroutine per accepted stream to wait for a worker token. Additionally, active workers block indefinitely in io.ReadFull() with no per-stream read deadline, allowing an attacker to pin all workers by sending a single byte so the read blocks waiting for the second byte of the DoQ length prefix. This enables an unauthenticated remote attacker to cause memory exhaustion and OOM-kill. This issue has been fixed in version 1.14.3. No known workarounds exist.","modified":"2026-08-29T05:27:27Z","published":"2026-05-05T20:16:35Z","upstream":["CVE-2026-32934"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-32934"}],"affected":[{"package":{"name":"coredns","ecosystem":"Azure Linux:3","purl":"pkg:rpm/azure-linux/coredns"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.11.4-17"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-85728.json"}}],"schema_version":"1.9.0"}