GHSA-558v-64gr-wgg4

    Dashboard / Vulnerabilities / GHSA-558v-64gr-wgg4

    GHSA-558v-64gr-wgg4

    Published: 22 Jul 2026Last Modified: 23 Jul 2026

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

    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()`]

    References: https://github.com/netty/netty/security/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

    Affected packages

    Package

    Name: io.netty:netty-codec-compression

    Purl: pkg:maven/io.netty/netty-codec-compression

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 4.2.0.Final
    Fixed -4.2.16.Final

    Affected versions

    4.2.0.Final
    4.2.1.Final
    4.2.10.Final
    4.2.11.Final
    4.2.12.Final
    4.2.13.Final
    4.2.14.Final
    4.2.15.Final
    4.2.2.Final
    4.2.3.Final
    4.2.4.Final
    4.2.5.Final
    4.2.6.Final
    4.2.7.Final
    4.2.8.Final
    4.2.9.Final

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High