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Ubuntu Security Notice USN-8397-1
June 08, 2026

jpeg-xl vulnerability
==========================================================================

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

- Ubuntu 26.04 LTS
- Ubuntu 25.10

Summary:

libjxl could be made to crash or run programs if it opened a specially
crafted file.

Software Description:
- jpeg-xl: Reference codec implementation for JPEG XL compressed raster image format

Details:

It was discovered that libjxl did not properly handle certain crafted PBM
images. An attacker could possibly use this issue to cause libjxl to crash,
resulting in a denial of service, or execute arbitrary code.

Update instructions:

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

Ubuntu 26.04 LTS
  libjxl-tools                    0.11.1-6ubuntu4.2
  libjxl0.11                      0.11.1-6ubuntu4.2

Ubuntu 25.10
  libjxl-tools                    0.11.1-6ubuntu1.2
  libjxl0.11                      0.11.1-6ubuntu1.2

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

References:
  https://ubuntu.com/security/notices/USN-8397-1
  CVE-2025-70103

Package Information:
  https://launchpad.net/ubuntu/+source/jpeg-xl/0.11.1-6ubuntu4.2
  https://launchpad.net/ubuntu/+source/jpeg-xl/0.11.1-6ubuntu1.2