==========================================================================
Ubuntu Security Notice USN-7687-1
August 06, 2025

poppler vulnerabilities
==========================================================================

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

- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

Several security issues were fixed in poppler.

Software Description:
- poppler: PDF rendering library

Details:

Jieyong Ma discovered that poppler incorrectly handled certain malformed
PDF files. A remote attacker could possibly use this issue to cause poppler
to crash, resulting in a denial of service. This issue only affected Ubuntu
16.04 LTS and Ubuntu 18.04 LTS. (CVE-2022-27337)

Kevin Backhouse discovered that poppler incorrectly handled documents with
a large number of annotations. If a user or automated system were tricked
into opening a specially crafted document, a remote attacker could use
this issue to cause poppler to consume resources, leading to a denial of
service, or possibly execute arbitrary code. (CVE-2025-52886)

Update instructions:

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

Ubuntu 20.04 LTS
  libpoppler97                    0.86.1-0ubuntu1.7+esm1
                                  Available with Ubuntu Pro
  poppler-utils                   0.86.1-0ubuntu1.7+esm1
                                  Available with Ubuntu Pro

Ubuntu 18.04 LTS
  libpoppler73                    0.62.0-2ubuntu2.14+esm7
                                  Available with Ubuntu Pro
  poppler-utils                   0.62.0-2ubuntu2.14+esm7
                                  Available with Ubuntu Pro

Ubuntu 16.04 LTS
  libpoppler58                    0.41.0-0ubuntu1.16+esm7
                                  Available with Ubuntu Pro
  poppler-utils                   0.41.0-0ubuntu1.16+esm7
                                  Available with Ubuntu Pro

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

References:
  https://ubuntu.com/security/notices/USN-7687-1
  CVE-2022-27337, CVE-2025-52886