RLSA-2026:91003: Important: libXrender security update

Q: What access does an attacker need to attempt exploitation?

The CVSS vector indicates the issue is remotely reachable and requires no privileges or prior authentication. Exploitation has high attack complexity and requires user interaction.

Q: What could successful exploitation allow?

The reported flaw is a heap overflow that can lead to code injection. The CVSS impact metrics indicate potential high impact to confidentiality, integrity, and availability, including across a changed security scope.

Published Oct 29, 2026

Updated

X.Org X11 libXrender runtime library

Security Fix(es):

libXrender: libXrender: Code injection via heap overflow in RenderQueryPictFormats (CVE-2026-88807)

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/libxrender<0:0.9.11-8.el10_2.1

0:0.9.11-8.el10_2.1

Remediation

Recommended actions to resolve this vulnerability, in priority order.

Upgrade
Upgrade rocky-linux/libXrender to a version that resolves this vulnerability.
Fixed in 0:0.9.11-8.el10_2.1

Event History

Oct 29, 2026

Advisory Published

via OSV·12:08 PM

Data Sourced

via OSV·12:08 PM

DescriptionSeverityAffected Software

Child vulnerabilities

Contains the following vulnerabilities.

CVE-2026-88807

Frequently Asked Questions

What access does an attacker need to attempt exploitation?

The CVSS vector indicates the issue is remotely reachable and requires no privileges or prior authentication. Exploitation has high attack complexity and requires user interaction.

What could successful exploitation allow?

The reported flaw is a heap overflow that can lead to code injection. The CVSS impact metrics indicate potential high impact to confidentiality, integrity, and availability, including across a changed security scope.

RLSA-2026:91003: Important: libXrender security update

Affected Software

Remediation

Event History

Child vulnerabilities

Frequently Asked Questions

What access does an attacker need to attempt exploitation?

What could successful exploitation allow?

Company

Resources

Contact

Frequently Asked Questions

What access does an attacker need to attempt exploitation?

What could successful exploitation allow?