CVE-2021-31598 Memory corruption in n/a

What is CVE-2021-31598?

CVE-2021-31598 is a high-severity memory corruption vulnerability in Debian Debian Linux, published on 24 Apr 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

An issue was discovered in libezxml.a in ezXML 0.8.6. The function ezxml_decode() performs incorrect memory handling while parsing crafted XML files, leading to a heap-based buffer overflow.

Weakness: CWE-787

Which versions are affected by CVE-2021-31598?

It affects 2 products.

Products include Debian Debian Linux, Ezxml Project Ezxml.

How do I fix CVE-2021-31598?

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-2021-31598 being exploited?

There is no known exploitation of CVE-2021-31598 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-2021-31598, GHSA-79rj-564v-63cr, UBUNTU-CVE-2021-31598.