RLSA-2026:92323: Important: expat security update

Q: What are the potential impacts of these issues?

The update addresses a denial-of-service condition caused by an integer overflow in expat_realloc and an information-disclosure issue caused by a heap buffer over-read in XML_ParseBuffer. The advisory rates the issues high severity with a CVSS score of 8.2.

Q: Does exploitation require authentication or user interaction?

The provided CVSS vector indicates network attack access, low attack complexity, no privileges required, and no user interaction. It also indicates high confidentiality impact and low availability impact.

Published Oct 30, 2026

Updated

Expat is a C library for parsing XML documents.

Security Fix(es):

expat: expat: Denial of Service via integer overflow in expatrealloc (CVE-2026-102633)

expat: expat: Information disclosure via heap buffer over-read in XMLParseBuffer (CVE-2026-77214)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Affected Software

1 affected componentFixes available

rocky-linux/expat<0:2.5.0-6.el8_10

0:2.5.0-6.el8_10

Remediation

Recommended actions to resolve this vulnerability, in priority order.

Upgrade
Upgrade rocky-linux/expat to a version that resolves this vulnerability.
Fixed in 0:2.5.0-6.el8_10

Event History

Oct 30, 2026

Advisory Published

via OSV·12:01 PM

Data Sourced

via OSV·12:01 PM

DescriptionSeverityAffected Software

Child vulnerabilities

Contains the following vulnerabilities.

Frequently Asked Questions

What are the potential impacts of these issues?

The update addresses a denial-of-service condition caused by an integer overflow in expat_realloc and an information-disclosure issue caused by a heap buffer over-read in XML_ParseBuffer. The advisory rates the issues high severity with a CVSS score of 8.2.

Does exploitation require authentication or user interaction?

The provided CVSS vector indicates network attack access, low attack complexity, no privileges required, and no user interaction. It also indicates high confidentiality impact and low availability impact.

RLSA-2026:92323: Important: expat security update

Affected Software

Remediation

Event History

Child vulnerabilities

Frequently Asked Questions

What are the potential impacts of these issues?

Does exploitation require authentication or user interaction?

Company

Resources

Contact

Frequently Asked Questions

What are the potential impacts of these issues?

Does exploitation require authentication or user interaction?