CVE-2023-28484

MEDIUMNVD 6.56.5—

6.5

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.

CVSS v3: 6.5
EG Score: 6.5(medium)
EPSS: 61.2%
KEV: Not listed

Published

April 24, 2023

Last Modified

May 30, 2025

References (10)

cve@mitrehttps://gitlab.gnome.org/GNOME/libxml2/-/issues/491
cve@mitrehttps://gitlab.gnome.org/GNOME/libxml2/-/releases/v2.10.4
cve@mitrehttps://lists.debian.org/debian-lts-announce/2023/04/msg00031.html
cve@mitrehttps://security.netapp.com/advisory/ntap-20230601-0006/
cve@mitrehttps://security.netapp.com/advisory/ntap-20240201-0005/
af854a3a-2127-422b-91ae-364da2661108https://gitlab.gnome.org/GNOME/libxml2/-/issues/491
af854a3a-2127-422b-91ae-364da2661108https://gitlab.gnome.org/GNOME/libxml2/-/releases/v2.10.4
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2023/04/msg00031.html
af854a3a-2127-422b-91ae-364da2661108https://security.netapp.com/advisory/ntap-20230601-0006/
af854a3a-2127-422b-91ae-364da2661108https://security.netapp.com/advisory/ntap-20240201-0005/

Patch Availability(6)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
ubuntu	libxml2-dev (2.9.3+dfsg1-1ubuntu0.7+esm5) @ xenial	2026-05-25	ubuntu
ubuntu	libxml2-dev (2.9.14+dfsg-1.1ubuntu0.1) @ lunar	2026-05-25	ubuntu
redhat	libxml2-0:2.9.7-13.el8_6.4	2024-01-25	redhat
redhat	libxml2	2023-08-15	redhat
redhat	libxml2-0:2.9.7-16.el8_8.1	2023-08-08	redhat
redhat	libxml2-0:2.9.13-3.el9_2.1	2023-08-01	redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-476NULL Pointer Dereference

All Vendor Advisories

(7)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 17× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-06 13:46 UTCepss_batch
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2026-06-05 22:46 UTCepss_batch
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2026-05-29 13:43 UTCepss_batch
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Frequently asked(5)

What is CVE-2023-28484?

CVE-2023-28484 is a medium vulnerability published on April 24, 2023. 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.

When was CVE-2023-28484 disclosed?

CVE-2023-28484 was first published in the National Vulnerability Database on April 24, 2023, with the most recent update on May 30, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2023-28484 actively exploited?

CVE-2023-28484 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 61.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2023-28484?

CVE-2023-28484 has a CVSS v3 base score of 6.5 (NVD).

How do I remediate CVE-2023-28484?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-28484, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2023-28484

Published

Last Modified

References (10)

Patch Availability(6)

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2023-28484?

Same vendor

Same CWE

CVE-2023-28484

📅 Published

🔄 Last Modified

🔗 References (10)

Patch Availability(6)

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2023-28484?

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References (10)

Frequently asked(5)

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