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[USN-7932-1] libsoup vulnerability

Posted on 15 December 2025
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-7932-1
December 15, 2025

libsoup3 vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 25.10
- Ubuntu 25.04
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS

Summary:

libsoup could be made to crash if it received specially crafted network
traffic.

Software Description:
- libsoup3: HTTP client/server library for GNOME

Details:

It was discovered libsoup incorrectly handled memory when handling specific
HTTP/2 read and cancel sequences. An attacker could possibly use this issue
to cause a denial of service.

Update instructions:

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

Ubuntu 25.10
libsoup-3.0-0 3.6.5-4ubuntu0.1

Ubuntu 25.04
libsoup-3.0-0 3.6.5-1ubuntu0.3

Ubuntu 24.04 LTS
libsoup-3.0-0 3.4.4-5ubuntu0.6

Ubuntu 22.04 LTS
libsoup-3.0-0 3.0.7-0ubuntu1+esm6
Available with Ubuntu Pro

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

References:
https://ubuntu.com/security/notices/USN-7932-1
CVE-2025-12105

Package Information:
https://launchpad.net/ubuntu/+source/libsoup3/3.6.5-4ubuntu0.1
https://launchpad.net/ubuntu/+source/libsoup3/3.6.5-1ubuntu0.3
https://launchpad.net/ubuntu/+source/libsoup3/3.4.4-5ubuntu0.6

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