Security Advisory

CVE-2026-42583

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-05-13 18:09:19

Last updated 2026-05-14 15:41:07

Assigner GitHub_M

CVSS score 7.5

State PUBLISHED

Description

Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final and 4.1.133.Final, Lz4FrameDecoder allocates a ByteBuf of size decompressedLength (up to 32 MB per block) before LZ4 runs. A peer only needs a 21-byte header plus compressedLength payload bytes - 22 bytes if compressedLength == 1 - to force that allocation. This vulnerability is fixed in 4.2.13.Final and 4.1.133.Final.

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