A pypdf2 security update has been released for Debian GNU/Linux 10 LTS to address an issue with missing xref marker.

[SECURITY] [DLA 3497-1] pypdf2 security update

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Debian LTS Advisory DLA-3497-1 debian-lts@lists.debian.org
https://www.debian.org/lts/security/ Adrian Bunk
July 14, 2023 https://wiki.debian.org/LTS
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Package : pypdf2
Version : 1.26.0-2+deb10u2
CVE ID : CVE-2023-36810

Quadratic runtime with malformed PDFs missing xref marker has been fixed
in PyPDF2, a pure Python PDF library.

For Debian 10 buster, this problem has been fixed in version
1.26.0-2+deb10u2.

We recommend that you upgrade your pypdf2 packages.

For the detailed security status of pypdf2 please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/pypdf2

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS