CVE-2026-48043

Netty is a network application framework for development of protocol servers and clients. In netty-codec-http2 prior to versions 4.1.135.Final and 4.2.15.Final, 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. Versions 4.1.135.Final and 4.2.15.Final patch the issue.
Configurations

Configuration 1 (hide)

OR cpe:2.3:a:netty:netty:*:*:*:*:*:*:*:*
cpe:2.3:a:netty:netty:*:*:*:*:*:*:*:*

History

21 Jul 2026, 12:18

Type Values Removed Values Added
References
  • () https://access.redhat.com/errata/RHSA-2026:41951 -

10 Jul 2026, 12:17

Type Values Removed Values Added
References
  • () https://access.redhat.com/errata/RHSA-2026:37390 -

09 Jul 2026, 13:17

Type Values Removed Values Added
References
  • () https://access.redhat.com/errata/RHSA-2026:36820 -

03 Jul 2026, 13:17

Type Values Removed Values Added
References
  • () https://access.redhat.com/errata/RHSA-2026:34608 -

30 Jun 2026, 03:20

Type Values Removed Values Added
CWE CWE-772
References
  • () https://access.redhat.com/errata/RHSA-2026:26017 -
  • () https://access.redhat.com/errata/RHSA-2026:26018 -
  • () https://access.redhat.com/errata/RHSA-2026:26586 -
  • () https://access.redhat.com/security/cve/CVE-2026-48043 -
  • () https://bugzilla.redhat.com/show_bug.cgi?id=2488442 -
  • () https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-48043.json -

15 Jun 2026, 01:56

Type Values Removed Values Added
References () https://github.com/netty/netty/releases/tag/netty-4.1.135.Final - () https://github.com/netty/netty/releases/tag/netty-4.1.135.Final - Release Notes
References () https://github.com/netty/netty/releases/tag/netty-4.2.15.Final - () https://github.com/netty/netty/releases/tag/netty-4.2.15.Final - Release Notes
References () https://github.com/netty/netty/security/advisories/GHSA-c2gf-v879-257j - () https://github.com/netty/netty/security/advisories/GHSA-c2gf-v879-257j - Vendor Advisory
First Time Netty netty
Netty
CPE cpe:2.3:a:netty:netty:*:*:*:*:*:*:*:*

12 Jun 2026, 16:18

Type Values Removed Values Added
New CVE

Information

Published : 2026-06-12 16:16

Updated : 2026-07-21 12:18


NVD link : CVE-2026-48043

Mitre link : CVE-2026-48043

CVE.ORG link : CVE-2026-48043


JSON object : View

Products Affected

netty

  • netty
CWE
CWE-400

Uncontrolled Resource Consumption

CWE-401

Missing Release of Memory after Effective Lifetime

CWE-772

Missing Release of Resource after Effective Lifetime