CVE-2026-73508Netty: Memory Leak in DNS Record Decoder via Malformed Domain Names

Beschreibung

Netty is an asynchronous, event-driven network application framework. Prior to 4.1.136.Final and 4.2.16.Final, io.netty.handler.codec.dns.AbstractDnsRecord, io.netty.handler.codec.dns.DefaultDnsRecordDecoder.decodeRecord(), and io.netty.handler.codec.dns.DnsCodecUtil.decompressDomainName() failed to release retained or newly allocated ByteBuf objects when IDN.toASCII() or encodeDomainName() rejected a malformed domain name, allowing unauthenticated remote DNS packets to leak direct memory incrementally until denial of service. This issue is fixed in versions 4.1.136.Final and 4.2.16.Final.

Daten: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Wiedergegeben wie in der Quelle, auf Englisch.

Betroffene Produkte und Versionen

Referenzen und Patches

• https://github.com/netty/netty/security/advisories/GHSA-mfg7-5gfp-c4w3 Vendor Advisory
• https://github.com/netty/netty/commit/5b68c61f37aa4a3045cba624cbea239655c9003b Patch
• https://github.com/netty/netty/commit/bb2ff68a1fb71cb4b0eb9a9e17b66c52aff680c6 Patch
• https://github.com/netty/netty/releases/tag/netty-4.1.136.Final Release Notes
• https://github.com/netty/netty/releases/tag/netty-4.2.16.Final Release Notes