How many CVEs have patched Http2Channel?

2 published CVEs changed Http2Channel in undertow-io/undertow, in 2 distinct patches totalling 33 changed lines, between 2024 and 2025.

What is the latest CVE that changed Http2Channel?

CVE-2025-9784 (Undertow: undertow madeyoureset http/2 ddos vulnerability), published 2025-09-02, changed lines 183 to 189 of core/src/main/java/io/undertow/protocols/http2/Http2Channel.java.

How does Http2Channel compare to the rest of undertow-io/undertow?

undertow-io/undertow has 22 CVEs with a located fix in total; 2 of them changed Http2Channel.

What do the line numbers refer to?

Line numbers are in the fixed version of the file, as the upstream patch left it. A CVE whose fix was backported to several branches is listed once, with the lines from the upstream commit.

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Patched Functions
Undertow Io
Undertow
Http2Channel

Http2Channel in undertow-io/undertow: Patched by 2 CVEs

undertow-io/undertow

Class

Http2Channel

Name: Http2Channel in undertow-io/undertow: CVE fixes
Creator: RadicalNotion.AI
License: https://creativecommons.org/licenses/by-nc/4.0/

core/src/main/java/io/undertow/protocols/http2/Http2Channel.java

Last patched September 2, 2025

CVEs

That changed this function

Distinct patches

Backports counted once

Lines changed

Added plus removed

2024–2025

Years

By CVE publication date

Overview

Http2Channel in undertow-io/undertow was changed by 2 published CVE fixes between 2024 and 2025, in 2 distinct patches that added or removed 33 lines in total.

undertow-io/undertow has 22 CVEs with a located fix in total, so 9% of them touched this function.

CVEs that patched it

Every published CVE whose fix changed Http2Channel, newest first, with the lines each fix touched.

Undertow: undertow madeyoureset http/2 ddos vulnerability
CVE-2025-9784 · lines 183–189 · +6 −2
High · CVSS 7.5
EPSS 2.3%2025-09-02
Undertow: url-encoded request path information can be broken on ajp-listener
CVE-2024-6162 · lines 73–266 · +24 −1 in 2 hunks
High · CVSS 8.7
EPSS 1.7%2024-06-20

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Other functions in these files

Functions in the same file that CVE fixes also changed.

1parseFramecore/src/main/java/io/undertow/protocols/http2/Http2Channel.java1 CVEs · 2 patches2022
2parseFrameNoContinuationcore/src/main/java/io/undertow/protocols/http2/Http2Channel.java1 CVEs · 2 patches2022
3handleRstWindowcore/src/main/java/io/undertow/protocols/http2/Http2Channel.java1 CVEs · 1 patches2025
4getMaxHeaderSizecore/src/main/java/io/undertow/protocols/http2/Http2Channel.java1 CVEs · 1 patches2024
5trackSentRstWindowcore/src/main/java/io/undertow/protocols/http2/Http2Channel.java1 CVEs · 1 patches2025
6sendRstStreamcore/src/main/java/io/undertow/protocols/http2/Http2Channel.java1 CVEs · 1 patches2025
7handleRstStreamcore/src/main/java/io/undertow/protocols/http2/Http2Channel.java1 CVEs · 1 patches2025

Other hotspots in the repository

Functions in undertow-io/undertow changed by the most CVE fixes.

handleEventWithNoRunningRequest4 CVEs · core/src/main/java/io/undertow/server/protocol/http/HttpReadListener.java encode3 CVEs · core/src/main/java/io/undertow/protocols/http2/HpackEncoder.java parse3 CVEs · core/src/main/java/io/undertow/server/protocol/ajp/AjpRequestParser.java handlePath3 CVEs · core/src/main/java/io/undertow/server/protocol/http/HttpRequestParser.java handleEvent3 CVEs · core/src/main/java/io/undertow/server/protocol/ajp/AjpReadListener.java handleDigestHeader3 CVEs · core/src/main/java/io/undertow/security/impl/DigestAuthenticationMechanism.java

All patched functions in undertow-io/undertow

Frequently asked questions

Common questions about CVE fixes to Http2Channel.

How many CVEs have patched Http2Channel?: 2 published CVEs changed Http2Channel in undertow-io/undertow, in 2 distinct patches totalling 33 changed lines, between 2024 and 2025.
What is the latest CVE that changed Http2Channel?: CVE-2025-9784 (Undertow: undertow madeyoureset http/2 ddos vulnerability), published 2025-09-02, changed lines 183 to 189 of core/src/main/java/io/undertow/protocols/http2/Http2Channel.java.
How does Http2Channel compare to the rest of undertow-io/undertow?: undertow-io/undertow has 22 CVEs with a located fix in total; 2 of them changed Http2Channel.
What do the line numbers refer to?: Line numbers are in the fixed version of the file, as the upstream patch left it. A CVE whose fix was backported to several branches is listed once, with the lines from the upstream commit.

References

core/src/main/java/io/undertow/protocols/http2/Http2Channel.java on GitHub (opens in a new tab)
All patched functions in undertow-io/undertow
Patched functions directory

Fix locations are computed by RadicalNotion.AI from the upstream patch diff of each CVE. CVE data is sourced from the CVE Program.

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On this page

Overview
CVEs that patched it
Other functions in these files
Other hotspots in the repository
FAQ
References