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Ubuntu 25.10: Vital Netty HTTP Denial of Service Vulnerabilities USN-7918-1

ubuntu
Calendar Grey December 10, 2025
Dist Ubuntu Esm H88
Several Netty security issues fixed in Ubuntu affecting various releases. Update recommended for continued security.
Several security issues were fixed in Netty.

Summary

Several security issues were fixed in Netty.

Software Description:

- netty: event-driven asynchronous network application framework

Details:

Jeppe Bonde Weikop discovered that Netty incorrectly parsed HTTP

messages. When Netty is used with certain reverse proxies, a

remote attacker could possibly use this issue to perform HTTP request

smuggling attacks. (CVE-2025-58056)

Jonas Konrad discovered that Netty did not properly manage memory when

decoding compressed data. A remote attacker could possibly use this

issue to cause Netty to consume excessive memory, resulting in a denial

of service. This issue was only addressed in Ubuntu 18.04 LTS, Ubuntu

20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, Ubuntu 25.04, and

Ubuntu 25.10. (CVE-2025-58057)

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu important HTTP issue netty

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 25.10
  libnetty-java                   1:4.1.48-10ubuntu0.25.10.2

Ubuntu 25.04
  libnetty-java                   1:4.1.48-10ubuntu0.25.04.2

Ubuntu 24.04 LTS
  libnetty-java                   1:4.1.48-9ubuntu0.1

Ubuntu 22.04 LTS
  libnetty-java                   1:4.1.48-4+deb11u2ubuntu0.1

Ubuntu 20.04 LTS
  libnetty-java                   1:4.1.45-1ubuntu0.1~esm4
                                  Available with Ubuntu Pro

Ubuntu 18.04 LTS
  libnetty-java                   1:4.1.7-4ubuntu0.1+esm5
                                  Available with Ubuntu Pro

Ubuntu 16.04 LTS
  libnetty-java                   1:4.0.34-1ubuntu0.1~esm3
                                  Available with Ubuntu Pro

In general, a standard system update will make all the necessary changes.

References

https://ubuntu.com/security/notices/USN-7918-1

CVE-2025-58056, CVE-2025-58057

Severity
important
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-7918-1

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu important HTTP issue netty

Package Information

https://launchpad.net/ubuntu/+source/netty/1:4.1.48-10ubuntu0.25.10.2
https://launchpad.net/ubuntu/+source/netty/1:4.1.48-10ubuntu0.25.04.2
https://launchpad.net/ubuntu/+source/netty/1:4.1.48-4+deb11u2ubuntu0.1

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