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[USN-8054-1] DjVuLibre vulnerabilities

Posted on 23 February 2026
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-8054-1
February 23, 2026

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

- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

Several security issues were fixed in DjVuLibre.

Software Description:
- djvulibre: DjVu image format library and tools

Details:

It was discovered that DjVuLibre could be forced to execute a division
by zero in certain instances. A remote attacker could possibly use
this issue to cause applications to stop responding or crash, resulting
in a denial of service. (CVE-2021-46312)

It was discovered that DjVuLibre incorrectly handled certain memory
operations. If a user or automated system were tricked into processing a
specially crafted DjVu file, a remote attacker could cause applications
to stop responding or crash, resulting in a denial of service, or possibly
execute arbitrary code. This issue only affected Ubuntu 16.04 LTS, Ubuntu
18.04 LTS, and Ubuntu 20.04 LTS. (CVE-2025-53367)

Update instructions:

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

Ubuntu 24.04 LTS
libdjvulibre21 3.5.28-2ubuntu0.24.04.2

Ubuntu 22.04 LTS
libdjvulibre21 3.5.28-2ubuntu0.22.04.2

Ubuntu 20.04 LTS
libdjvulibre21 3.5.27.1-14ubuntu0.1+esm1
Available with Ubuntu Pro

Ubuntu 18.04 LTS
libdjvulibre21 3.5.27.1-8ubuntu0.4+esm1
Available with Ubuntu Pro

Ubuntu 16.04 LTS
libdjvulibre21 3.5.27.1-5ubuntu0.1+esm3
Available with Ubuntu Pro

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

References:
https://ubuntu.com/security/notices/USN-8054-1
CVE-2021-46312, CVE-2025-53367

Package Information:
https://launchpad.net/ubuntu/+source/djvulibre/3.5.28-2ubuntu0.24.04.2
https://launchpad.net/ubuntu/+source/djvulibre/3.5.28-2ubuntu0.22.04.2

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