CVE-2023-28484 Null dereference in n/a

What is CVE-2023-28484?

CVE-2023-28484 is a medium-severity vulnerability in Debian Debian Linux, published on 24 Apr 2023. 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

In libxml2 before 2.10.4, parsing of certain invalid XSD schemas can lead to a NULL pointer dereference and subsequently a segfault. This occurs in xmlSchemaFixupComplexType in xmlschemas.c.

Weakness: CWE-476

Which versions are affected by CVE-2023-28484?

It affects 2 products.

Products include Debian Debian Linux, Xmlsoft Libxml2.

How do I fix CVE-2023-28484?

Upgrade to a fixed version.

Is CVE-2023-28484 being exploited?

There is no known exploitation of CVE-2023-28484 in the wild and no public exploit code.

Other vulnerabilities in Debian Debian Linux

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• 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 ALPINE-CVE-2023-28484, AZL-26281, DEBIAN-CVE-2023-28484, ECHO-44f6-4efa-a14a, GHSA-7cv2-wjgm-j7rm, JLSEC-2025-79 and 1 more.