CVE-2026-42583
CVE-2026-42583 · Netty: Lz4FrameDecoder resource exhaustion
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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.
CVSS 7.5 · High · EPSS 0.5%
- Published
- Updated
Stack: system
Affected products and versions
netty
- Versions
- >= 4.2.0.Alpha1, < 4.2.13.Final: Affected
- < 4.1.133.Final: Affected
No fix published
netty-codec
- Versions
- < 4.1.133.Final: Affected
No fix published
netty-codec-compression
- Versions
- < 4.2.13.Final: Affected
No fix published
netty Debian:12
- Versions
- 1:4.1.48-10
- 1:4.1.48-11
- 1:4.1.48-12
- 1:4.1.48-13
- 1:4.1.48-14
- 1:4.1.48-15
- 1:4.1.48-16
- 1:4.1.48-7
- 1:4.1.48-7+deb12u1
- 1:4.1.48-7+deb12u2
- 1:4.1.48-8
- 1:4.1.48-9
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
netty Debian:13
- Versions
- 1:4.1.48-10
- 1:4.1.48-10+deb13u1
- 1:4.1.48-11
- 1:4.1.48-12
- 1:4.1.48-13
- 1:4.1.48-14
- 1:4.1.48-15
- 1:4.1.48-16
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
netty Debian:14
- Versions
- 1:4.1.48-10
- 1:4.1.48-11
- 1:4.1.48-12
- 1:4.1.48-13
- 1:4.1.48-14
- 1:4.1.48-15
- 1:4.1.48-16
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published