CVE-2021-45343 Null dereference in n/a

What is CVE-2021-45343?

CVE-2021-45343 is a medium-severity vulnerability in Debian Debian Linux, published on 25 Jan 2022. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

In LibreCAD 2.2.0, a NULL pointer dereference in the HATCH handling of libdxfrw allows an attacker to crash the application using a crafted DXF document.

Weakness: CWE-476

Which versions are affected by CVE-2021-45343?

It affects 3 products.

Products include Debian Debian Linux, Fedoraproject Fedora, Librecad Librecad.

How do I fix CVE-2021-45343?

Upgrade to a fixed version.

Is CVE-2021-45343 being exploited?

There is no known exploitation of CVE-2021-45343 in the wild and no public exploit code.

Other vulnerabilities in Debian Debian Linux

• CVE-2015-3306 ProFTPD Improper Access Control Exploited Critical 10.0
• CVE-2025-49113 RoundCube Webmail Deserialization of Untrusted Data Exploited Critical 9.9
• CVE-2026-24061 GNU InetUtils Argument Injection Exploited Critical 9.8
• CVE-2025-39682 Linux Kernel Improper Check for Unusual or Exceptional Conditions Exploited Critical 9.8
• CVE-2024-9680 Mozilla Firefox Use-After-Free Exploited Critical 9.8

All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2021-45343, GHSA-xcgm-pvwf-mjq7, UBUNTU-CVE-2021-45343.