ALSA-2026:92323: Important: expat security update

Q: Which AlmaLinux packages are covered by this advisory?

The advisory covers the almalinux/expat and almalinux/expat-devel packages.

Q: What security impacts do the listed CVEs have?

CVE-2026-102633 is described as a denial-of-service issue caused by an integer overflow in expat_realloc. CVE-2026-77214 is described as an information-disclosure issue caused by a heap buffer over-read in XML_ParseBuffer.

Q: What should be prioritized for remediation?

Prioritize applying the available security update for systems with the covered Expat packages, particularly where Expat is used to parse XML documents.

Published Oct 29, 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

2 affected componentsFixes available

almalinux/expat<2.5.0-6.el8_10

2.5.0-6.el8_10

almalinux/expat-devel<2.5.0-6.el8_10

2.5.0-6.el8_10

Remediation

Recommended actions to resolve this vulnerability, in priority order.

Upgrade
Upgrade almalinux/expat to a version that resolves this vulnerability.
Fixed in 2.5.0-6.el8_10
Upgrade
Upgrade almalinux/expat-devel to a version that resolves this vulnerability.
Fixed in 2.5.0-6.el8_10

Event History

Oct 29, 2026

Advisory Published

via OSV·12:00 AM

Data Sourced

via OSV·12:00 AM

DescriptionAffected Software

Child vulnerabilities

Contains the following vulnerabilities.

Frequently Asked Questions

Which AlmaLinux packages are covered by this advisory?

The advisory covers the almalinux/expat and almalinux/expat-devel packages.

What security impacts do the listed CVEs have?

CVE-2026-102633 is described as a denial-of-service issue caused by an integer overflow in expat_realloc. CVE-2026-77214 is described as an information-disclosure issue caused by a heap buffer over-read in XML_ParseBuffer.

What should be prioritized for remediation?

Prioritize applying the available security update for systems with the covered Expat packages, particularly where Expat is used to parse XML documents.

ALSA-2026:92323: Important: expat security update

Affected Software

Remediation

Event History

Child vulnerabilities

Frequently Asked Questions

Which AlmaLinux packages are covered by this advisory?

What security impacts do the listed CVEs have?

What should be prioritized for remediation?

Company

Resources

Contact

Frequently Asked Questions

Which AlmaLinux packages are covered by this advisory?

What security impacts do the listed CVEs have?

What should be prioritized for remediation?