CVE-2026-73508
Description
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
io.netty:netty-codec-dnsMaven | >= 4.2.0.Final, < 4.2.16.Final | 4.2.16.Final |
io.netty:netty-codec-dnsMaven | < 4.1.136.Final | 4.1.136.Final |
Affected products
1Patches
Vulnerability mechanics
References
8- github.com/advisories/GHSA-mfg7-5gfp-c4w3ghsaADVISORY
- github.com/netty/netty/commit/5b68c61f37aa4a3045cba624cbea239655c9003bnvdWEB
- github.com/netty/netty/commit/bb2ff68a1fb71cb4b0eb9a9e17b66c52aff680c6nvdWEB
- github.com/netty/netty/pull/17063ghsaWEB
- github.com/netty/netty/pull/17065ghsaWEB
- github.com/netty/netty/releases/tag/netty-4.1.136.FinalnvdWEB
- github.com/netty/netty/releases/tag/netty-4.2.16.FinalnvdWEB
- github.com/netty/netty/security/advisories/GHSA-mfg7-5gfp-c4w3nvdWEB
News mentions
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