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GHSA-558v-64gr-wgg4 | Mondoo Vulnerability Intelligence

Vulnerability IntelligenceGHSA-558v-64gr-wgg4

GHSA-558v-64gr-wgg4

HIGH8.7

Netty: [Bzip2Decoder] Infinite Loop in RLE State Machine Leads to Event-Loop Thread Hang

Published Jul 22, 2026

Modified 1 months ago

Fix available

Details

The Bzip2Decoder handler in Netty's compression codec pipeline is vulnerable to a denial-of-service attack through a malformed bzip2 stream that permanently captures the event-loop thread in an infinite loop. The vulnerability exists in the run-length encoding (RLE) state machine within [Bzip2BlockDecompressor.read()]

Affected Packages

io.netty:netty-codec

Maven

Fixed in:

4.1.136.Final

io.netty:netty-codec-compression

Maven

Fixed in:

4.2.16.Final

References

https://github.com/advisories/GHSA-558v-64gr-wgg4

https://github.com/netty/netty

https://github.com/netty/netty/releases/tag/netty-4.1.136.Final

https://github.com/netty/netty/releases/tag/netty-4.2.16.Final

https://github.com/netty/netty/security/advisories/GHSA-558v-64gr-wgg4

Aliases

CVSS Analysis

CVSS v4.0

8.7

Exploitability

Attack Vector

NetworkAV:N

Attack Complexity

LowAC:L

Attack Requirements

NoneAT:N

Privileges Required

NonePR:N

User Interaction

NoneUI:N

Vulnerable System

Vuln. Confidentiality

NoneVC:N

Vuln. Integrity

NoneVI:N

Vuln. Availability

HighVA:H

Subsequent System

Subseq. Confidentiality

NoneSC:N

Subseq. Integrity

NoneSI:N

Subseq. Availability

NoneSA:N

8.7/CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Related

Ecosystems

Timeline

PublishedJul 22, 2026

ModifiedJul 22, 2026