GHSA-c2gf-v879-257j

    Dashboard / Vulnerabilities / GHSA-c2gf-v879-257j

    GHSA-c2gf-v879-257j

    Published: 11 Jun 2026Last Modified: 6 Oct 2026

    Summary: netty-codec-http2: ByteBuf Reference-Count Leak in DelegatingDecompressorFrameListener Leads to Memory Exhaustion

    Details: ### Impact The `DelegatingDecompressorFrameListener` class orchestrates HTTP/2 decompression by embedding a per-stream `EmbeddedChannel` that runs the appropriate decompression codec (gzip, deflate, zstd) and forwards decompressed chunks to a wrapped listener. Each decompressed chunk is a pooled `ByteBuf` handed to an anonymous `ChannelInboundHandlerAdapter` tail handler, which becomes the sole owner responsible for releasing it. A remote peer could send frames that would result in the flow-controller throwing and so trigger a resource leak which at the end might take down the whole JVM due OOME.

    References: https://github.com/netty/netty/security/advisories/GHSA-c2gf-v879-257j, https://nvd.nist.gov/vuln/detail/CVE-2026-48043, https://github.com/netty/netty/commit/db6138b168699736a6463c367e12ad0a4c36a25e, https://github.com/netty/netty/commit/3d45a1e4e8eb99144f716e54be5ac57e525fa7ca, https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-48043.json, https://github.com/netty/netty/releases/tag/netty-4.2.15.Final, https://github.com/netty/netty/releases/tag/netty-4.1.135.Final, https://github.com/netty/netty, https://bugzilla.redhat.com/show_bug.cgi?id=2488442, https://access.redhat.com/security/cve/CVE-2026-48043, https://access.redhat.com/errata/RHSA-2026:66488, https://access.redhat.com/errata/RHSA-2026:65126, https://access.redhat.com/errata/RHSA-2026:54435, https://access.redhat.com/errata/RHSA-2026:53806, https://access.redhat.com/errata/RHSA-2026:53646, https://access.redhat.com/errata/RHSA-2026:53645, https://access.redhat.com/errata/RHSA-2026:53644, https://access.redhat.com/errata/RHSA-2026:50085, https://access.redhat.com/errata/RHSA-2026:48151, https://access.redhat.com/errata/RHSA-2026:48124, https://access.redhat.com/errata/RHSA-2026:41951, https://access.redhat.com/errata/RHSA-2026:37390, https://access.redhat.com/errata/RHSA-2026:36820, https://access.redhat.com/errata/RHSA-2026:34608, https://access.redhat.com/errata/RHSA-2026:26586, https://access.redhat.com/errata/RHSA-2026:26018, https://access.redhat.com/errata/RHSA-2026:26017

    Affected packages

    Package

    Name: io.netty:netty-codec-http2

    Purl: pkg:maven/io.netty/netty-codec-http2

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -4.1.135.Final

    Affected versions

    4.1.0.Beta4
    4.1.0.Beta5
    4.1.0.Beta6
    4.1.0.Beta7
    4.1.0.Beta8
    4.1.0.CR1
    4.1.0.CR2
    4.1.0.CR3
    4.1.0.CR4
    4.1.0.CR5
    4.1.0.CR6
    4.1.0.CR7
    4.1.0.Final
    4.1.1.Final
    4.1.10.Final
    4.1.100.Final
    4.1.101.Final
    4.1.102.Final
    4.1.103.Final
    4.1.104.Final
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    4.1.109.Final
    4.1.11.Final
    4.1.110.Final
    4.1.111.Final
    4.1.112.Final
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    4.1.114.Final
    4.1.115.Final
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    4.1.134.Final
    4.1.14.Final
    4.1.15.Final
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    4.1.17.Final
    4.1.18.Final
    4.1.19.Final
    4.1.2.Final
    4.1.20.Final
    4.1.21.Final
    4.1.22.Final
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    4.1.24.Final
    4.1.25.Final
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    4.1.96.Final
    4.1.97.Final
    4.1.98.Final
    4.1.99.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
    GHSA-c2gf-v879-257j | CVE-DB