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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Affected Vendors & Products
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History
Thu, 14 May 2026 16:30:00 +0000
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ssvc
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Thu, 14 May 2026 15:00:00 +0000
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Io.netty
Io.netty netty-codec Io.netty netty-codec-compression Netty Netty netty |
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| Vendors & Products |
Io.netty
Io.netty netty-codec Io.netty netty-codec-compression Netty Netty netty |
Wed, 13 May 2026 18:30:00 +0000
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| 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. | |
| Title | Netty: Lz4FrameDecoder resource exhaustion | |
| Weaknesses | CWE-400 CWE-770 |
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| References |
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cvssV3_1
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-05-14T15:41:07.253Z
Reserved: 2026-04-28T17:26:12.086Z
Link: CVE-2026-42583
Updated: 2026-05-14T15:40:59.151Z
Status : Awaiting Analysis
Published: 2026-05-13T19:17:23.903
Modified: 2026-05-14T16:26:50.047
Link: CVE-2026-42583
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