Is CVE-2023-28484 in the CISA KEV catalog?

No. CVE-2023-28484 is not currently on the CISA Known Exploited Vulnerabilities list.

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

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

What is the EPSS score for CVE-2023-28484?

CVE-2023-28484 has an EPSS score of 1.09% (61th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2023-28484?

Upgrade libxml2 on debian 11 to 2.9.10+dfsg-6.7+deb11u4 or later. Fixes are available for 15 affected products.

CVE & CISA-KEV Catalog

CVE-2023-28484

MEDIUM

6.5

CVSS v3

NVD

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.

CWE-476NULL Pointer Dereference

How to fix

Remediation Available

libxml2Debian

Fixed in:2.9.10+dfsg-6.7+deb11u4CVE-2023-28484

Fixed in:2.9.14+dfsg-1.2CVE-2023-28484

libxml2Rocky

Fixed in:0:2.9.7-16.el8_8.1RHSA-2023:4529

Fixed in:0:2.9.7-13.el8_6.4RHSA-2024:0413

Fixed in:0:2.9.7-16.el8_8.1RHSA-2023:4529

Fixed in:0:2.9.7-13.el8_6.4RHSA-2024:0413

Fixed in:0:2.9.13-3.el9_2.1RHSA-2023:4349

libxml2Red Hat / RHEL

Fixed in:0:2.9.7-16.el8_8.1RHSA-2023:4529

Fixed in:0:2.9.7-13.el8_6.4RHSA-2024:0413

Fixed in:0:2.9.7-16.el8_8.1RHSA-2023:4529

Fixed in:0:2.9.7-13.el8_6.4RHSA-2024:0413

Fixed in:0:2.9.13-3.el9_2.1RHSA-2023:4349

libxml2-debuginfoRocky

Fixed in:0:2.9.7-16.el8_8.1RHSA-2023:4529

Fixed in:0:2.9.7-13.el8_6.4RHSA-2024:0413

Fixed in:0:2.9.7-16.el8_8.1RHSA-2023:4529

Fixed in:0:2.9.7-13.el8_6.4RHSA-2024:0413

Fixed in:0:2.9.7-16.el8_8.1RHSA-2023:4529

Fixed in:0:2.9.7-13.el8_6.4RHSA-2024:0413

Fixed in:0:2.9.7-16.el8_8.1RHSA-2023:4529

Fixed in:0:2.9.7-13.el8_6.4RHSA-2024:0413

Fixed in:0:2.9.13-3.el9_2.1RHSA-2023:4349

libxml2-debuginfoRed Hat / RHEL

Fixed in:0:2.9.7-16.el8_8.1RHSA-2023:4529

Fixed in:0:2.9.7-13.el8_6.4RHSA-2024:0413

Fixed in:0:2.9.7-16.el8_8.1RHSA-2023:4529

Fixed in:0:2.9.7-13.el8_6.4RHSA-2024:0413

Fixed in:0:2.9.7-16.el8_8.1RHSA-2023:4529

Fixed in:0:2.9.7-13.el8_6.4RHSA-2024:0413

Fixed in:0:2.9.7-16.el8_8.1RHSA-2023:4529

Fixed in:0:2.9.13-3.el9_2.1RHSA-2023:4349

libxml2-debugsourceRocky

Fixed in:0:2.9.7-13.el8_6.4RHSA-2024:0413

Fixed in:0:2.9.7-16.el8_8.1RHSA-2023:4529

Fixed in:0:2.9.7-13.el8_6.4RHSA-2024:0413

Fixed in:0:2.9.7-16.el8_8.1RHSA-2023:4529

Fixed in:0:2.9.7-13.el8_6.4RHSA-2024:0413

Fixed in:0:2.9.7-16.el8_8.1RHSA-2023:4529

Fixed in:0:2.9.13-3.el9_2.1RHSA-2023:4349

libxml2-debugsourceRed Hat / RHEL

Fixed in:0:2.9.7-16.el8_8.1RHSA-2023:4529

Fixed in:0:2.9.7-13.el8_6.4RHSA-2024:0413

Fixed in:0:2.9.7-16.el8_8.1RHSA-2023:4529

Fixed in:0:2.9.7-13.el8_6.4RHSA-2024:0413

Fixed in:0:2.9.7-16.el8_8.1RHSA-2023:4529

Fixed in:0:2.9.7-13.el8_6.4RHSA-2024:0413

Fixed in:0:2.9.13-3.el9_2.1RHSA-2023:4349

libxml2-develRed Hat / RHEL

Fixed in:0:2.9.7-13.el8_6.4RHSA-2024:0413

Fixed in:0:2.9.7-16.el8_8.1RHSA-2023:4529

Fixed in:0:2.9.13-3.el9_2.1RHSA-2023:4349

libxml2-develRocky

Fixed in:0:2.9.7-13.el8_6.4RHSA-2024:0413

Fixed in:0:2.9.7-16.el8_8.1RHSA-2023:4529

Fixed in:0:2.9.13-3.el9_2.1RHSA-2023:4349

python3-libxml2Red Hat / RHEL

Fixed in:0:2.9.7-16.el8_8.1RHSA-2023:4529

Fixed in:0:2.9.7-13.el8_6.4RHSA-2024:0413

Fixed in:0:2.9.7-16.el8_8.1RHSA-2023:4529

Fixed in:0:2.9.7-13.el8_6.4RHSA-2024:0413

Fixed in:0:2.9.7-16.el8_8.1RHSA-2023:4529

Fixed in:0:2.9.13-3.el9_2.1RHSA-2023:4349

python3-libxml2Rocky

Fixed in:0:2.9.7-16.el8_8.1RHSA-2023:4529

Fixed in:0:2.9.7-13.el8_6.4RHSA-2024:0413

Fixed in:0:2.9.13-3.el9_2.1RHSA-2023:4349

python3-libxml2-debuginfoRed Hat / RHEL

Fixed in:0:2.9.7-13.el8_6.4RHSA-2024:0413

Fixed in:0:2.9.7-16.el8_8.1RHSA-2023:4529

Fixed in:0:2.9.7-13.el8_6.4RHSA-2024:0413

Fixed in:0:2.9.7-16.el8_8.1RHSA-2023:4529

Fixed in:0:2.9.7-13.el8_6.4RHSA-2024:0413

Fixed in:0:2.9.13-3.el9_2.1RHSA-2023:4349

python3-libxml2-debuginfoRocky

Fixed in:0:2.9.7-13.el8_6.4RHSA-2024:0413

Fixed in:0:2.9.7-16.el8_8.1RHSA-2023:4529

Fixed in:0:2.9.7-13.el8_6.4RHSA-2024:0413

Fixed in:0:2.9.7-16.el8_8.1RHSA-2023:4529

Fixed in:0:2.9.7-13.el8_6.4RHSA-2024:0413

Fixed in:0:2.9.13-3.el9_2.1RHSA-2023:4349

libxml2Ubuntu

Fixed in:2.9.1+dfsg1-3ubuntu4.13+esm5USN-6028-1

Fixed in:2.9.3+dfsg1-1ubuntu0.7+esm5USN-6028-1

Fixed in:2.9.4+dfsg1-6.1ubuntu1.9USN-6028-1

Fixed in:2.9.10+dfsg-5ubuntu0.20.04.6USN-6028-1

Fixed in:2.9.13+dfsg-1ubuntu0.3USN-6028-1

Fixed in:2.9.14+dfsg-1ubuntu0.2USN-6028-1

Fixed in:2.9.14+dfsg-1.1ubuntu0.1USN-6028-2

libxml2-utilsUbuntu

Fixed in:2.9.1+dfsg1-3ubuntu4.13+esm5USN-6028-1

Fixed in:2.9.3+dfsg1-1ubuntu0.7+esm5USN-6028-1

Fixed in:2.9.4+dfsg1-6.1ubuntu1.9USN-6028-1

Fixed in:2.9.10+dfsg-5ubuntu0.20.04.6USN-6028-1

Fixed in:2.9.13+dfsg-1ubuntu0.3USN-6028-1

Fixed in:2.9.14+dfsg-1ubuntu0.2USN-6028-1

Fixed in:2.9.14+dfsg-1.1ubuntu0.1USN-6028-2

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Exploit Intelligence

1.09%probability of exploitation in 30 days

61stpercentile

Moderate risk: more likely to be exploited than 61% of all known CVEs.

References

Patch1

gitlab.gnome.org

Third-Party Advisory1

lists.debian.org

Release Notes1

gitlab.gnome.org

Other references2

Related Vulnerabilities

Other CWE-476 (NULL Pointer Dereference) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-21758	High	7.5	92%	-	Fix
CVE-2023-21547	High	7.5	88%	-	Fix
CVE-2014-3470	Medium	4.3	86%	-	Fix
CVE-2021-44224	High	8.2	82%	-	Fix
CVE-2016-0742	High	7.5	82%	-	Fix
CVE-2009-1386	Medium	5.0	80%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-05-30.