CVE-2021-43579 Memory corruption in n/a

What is CVE-2021-43579?

CVE-2021-43579 is a high-severity memory corruption vulnerability in Debian Debian Linux, published on 12 Nov 2021. 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

A stack-based buffer overflow in image_load_bmp() in HTMLDOC <= 1.9.13 results in remote code execution if the victim converts an HTML document linking to a crafted BMP file.

Weakness: CWE-787

Which versions are affected by CVE-2021-43579?

It affects 2 products.

Products include Debian Debian Linux, Htmldoc Project Htmldoc.

How do I fix CVE-2021-43579?

Apply the vendor's patch.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2021-43579 being exploited?

There is no known exploitation of CVE-2021-43579 in the wild and no public exploit code.

Public exploit code: 1 Exploit-DB entry.

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-2021-43579, GHSA-999x-mjp8-5gfp, MGASA-2022-0033, SUSE-SU-2022:14877-1, UBUNTU-CVE-2021-43579, openSUSE-SU-2024:11741-1.