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Ubuntu 26.04 LTS libjxl Severe Denial of Service USN-8397-1

ubuntu
Calendar Grey June 8, 2026
Dist Ubuntu Esm H88
libjxl on Ubuntu could crash or run programs from malicious files. Immediate updates are needed for safety.
libjxl could be made to crash or run programs if it opened a specially crafted file.

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.

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu libjxl jpeg-xl

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

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-8397-1

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu libjxl jpeg-xl

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

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