MEDIUM

CVE-2023-28484

CVSS v3

6.5

MEDIUM

EPSS Score

1.2 %

exploit probability, as of 2026-10-15

CISA KEV

known exploited

Exploitation

—

SSVC status

Get an alert for each new CVE published for libxml2. Watch libxml2 in CVE Watch Free account · no credit card

Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

libxml2AlmaLinux:9all versions · fixed in 2.9.13-3.el9_2.1and 2 other packages
libxml2AlmaLinux:8all versions · fixed in 2.9.7-16.el8_8.1and 2 other packages

Vendor advisories

CVE-2023-28484 Red Hat Product Security136 products fixed · 10 known affected
libxml2: NULL dereference in xmlSchemaFixupComplexType
libxml2 as a component of Red Hat Enterprise Linux 6 · libxml2-devel as a component of Red Hat Enterprise Linux 6 · libxml2-python as a component of Red Hat Enterprise Linux 6
ICSA-25-044-09 CISA19 known affected
Siemens SCALANCE W700 IEEE 802.11ax
SCALANCE WAB762-1 (6GK5762-1AJ00-6AA0) · SCALANCE WAM763-1 (6GK5763-1AL00-7DA0) · SCALANCE WAM763-1 (ME) (6GK5763-1AL00-7DC0)
SSA-769027 Siemens ProductCERT19 known affected
SSA-769027: Multiple Vulnerabilities fixed in SCALANCE W700 IEEE 802.11ax devices before V3.0.0
SCALANCE WAB762-1 (6GK5762-1AJ00-6AA0) · SCALANCE WAM763-1 (6GK5763-1AL00-7DA0) · SCALANCE WAM763-1 (ME) (6GK5763-1AL00-7DC0)
ICSA-24-165-04 CISA1 known affected
Siemens ST7 ScadaConnect
ST7 ScadaConnect (6NH7997-5DA10-0AA0)
ICSA-24-165-10 CISA6 known affected
Siemens SIMATIC and SIPLUS
SIMATIC CP 1542SP-1 (6GK7542-6UX00-0XE0) · SIMATIC CP 1542SP-1 IRC (6GK7542-6VX00-0XE0) · SIMATIC CP 1543SP-1 (6GK7543-6WX00-0XE0)
SSA-341067 Siemens ProductCERT1 known affected
SSA-341067: Multiple vulnerabilities in third-party components in ST7 ScadaConnect before V1.1
ST7 ScadaConnect (6NH7997-5DA10-0AA0)

8 more advisories

Full record on 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.

Technical details

Published: 2023-04-24

Frequently asked questions

What is CVE-2023-28484?

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.

Is CVE-2023-28484 actively exploited?

Active exploitation of CVE-2023-28484 has not been confirmed. Its EPSS score was 1.2% on 2026-10-15, the estimated probability of exploitation in the next 30 days.

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

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

Running libxml2? Hear about its next vulnerability

CVE Watch matches each new CVE to the vendors and products you list (vendor and product, not the version) and puts it in your alerts with its KEV and EPSS status.

Get alerts for this product CISA KEV additions, October 2026 Search CVEs

Already have an account? Open CVE WatchNo credit card required · 50 free checks/month · Free API key

Go further

Following what attackers exploit right now? The CISA KEV additions of the month, with their patch deadlines.
Running this software? CVE Watch alerts you to new vulnerabilities in your products.

Related vulnerabilities

Same product first, then the same vendor advisory and the same publication week.

Back to CVE Database