← CVE Intelligence

CVE-2026-73508

Netty: Memory Leak in DNS Record Decoder via Malformed Domain Names PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
netty / nettyaffected < 4.1.136.Final; affected >= 4.2.0.Final, < 4.2.16.Final

CWE

CWE-772

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.