What’s Vulnerable › Vulnerabilities

CVE-2023-28484

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2023-04-24 · updated 2026-10-14
• Weakness: CWE-476

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.

Affected products

• Debian Linux: 10.0
• xmlsoft libxml2: before 2.10.4 — fixed in 2.10.4

How to fix

Upgrade to a fixed version: xmlsoft libxml2 2.10.4. Check the vendor advisory for mitigations.

References

• https://gitlab.gnome.org/GNOME/libxml2/-/issues/491
• https://gitlab.gnome.org/GNOME/libxml2/-/releases/v2.10.4
• https://lists.debian.org/debian-lts-announce/2023/04/msg00031.html
• https://security.netapp.com/advisory/ntap-20230601-0006/
• https://security.netapp.com/advisory/ntap-20240201-0005/
• https://gitlab.gnome.org/GNOME/libxml2/-/issues/491
• https://gitlab.gnome.org/GNOME/libxml2/-/releases/v2.10.4
• https://lists.debian.org/debian-lts-announce/2023/04/msg00031.html
• https://security.netapp.com/advisory/ntap-20230601-0006/
• https://security.netapp.com/advisory/ntap-20240201-0005/
• https://cert-portal.siemens.com/productcert/html/ssa-341067.html
• https://cert-portal.siemens.com/productcert/html/ssa-398330.html

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