CVE-2025-58057

Netty is an asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers & clients. In netty-codec-compression versions 4.1.124.Final and below, and netty-codec versions 4.2.4.Final and below, when supplied with specially crafted input, BrotliDecoder and certain other decompression decoders will allocate a large number of reachable byte buffers, which can lead to denial of service. BrotliDecoder.decompress has no limit in how often it calls pull, decompressing data 64K bytes at a time. The buffers are saved in the output list, and remain reachable until OOM is hit. This is fixed in versions 4.1.125.Final of netty-codec and 4.2.5.Final of netty-codec-compression.

• CWE-409

• https://github.com/netty/netty/commit/9d804c54ce962408ae6418255a83a13924f7145dPatch
• https://github.com/netty/netty/security/advisories/GHSA-3p8m-j85q-pgmjExploit, Vendor Advisory

Published

Sep 4, 2025

Last Modified

Jun 17, 2026

Status

Analyzed

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