CVE-2026-42583 (GCVE-0-2026-42583)

Vulnerability from cvelistv5 – Published: 2026-05-13 18:09 – Updated: 2026-05-14 15:41
VLAI
Title
Netty: Lz4FrameDecoder resource exhaustion
Summary
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.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: poc Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-14 15:40 UTC
CWE
  • CWE-400 - Uncontrolled Resource Consumption
  • CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7858 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
netty netty Affected: >= 4.2.0.Alpha1, < 4.2.13.Final
Affected: < 4.1.133.Final
guessed Create a notification for this product.
io.netty netty-codec Affected: < 4.1.133.Final
guessed Create a notification for this product.
io.netty netty-codec-compression Affected: < 4.2.13.Final
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

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