CVE-2021-30485 Null dereference in n/a

What is CVE-2021-30485?

CVE-2021-30485 is a medium-severity vulnerability in Debian Debian Linux, published on 11 Apr 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

An issue was discovered in libezxml.a in ezXML 0.8.6. The function ezxml_internal_dtd(), while parsing a crafted XML file, performs incorrect memory handling, leading to a NULL pointer dereference while running strcmp() on a NULL pointer.

Weakness: CWE-476

Which versions are affected by CVE-2021-30485?

It affects 2 products.

Products include Debian Debian Linux, Ezxml Project Ezxml.

How do I fix CVE-2021-30485?

Apply the vendor's patch.

Is CVE-2021-30485 being exploited?

There is no known exploitation of CVE-2021-30485 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-2021-30485, GHSA-vjh2-vp2w-jhxr, UBUNTU-CVE-2021-30485.