RHSA-2026:55446: Important: libXfont2 security update

Published Aug 17, 2026

Updated

X.Org X11 libXfont2 runtime librarySecurity Fix(es): libxfont2: Font Server Client encoding[] Out-Of-Bounds Read/Write (CVE-2026-59679) libxfonts2: libXfont2: Privilege Escalation via Heap Buffer Overflow in Font Server Client (CVE-2026-44950) 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 components

X.Org libXfont2

X.Org libXfonts2

Event History

Aug 17, 2026

Advisory Published

via Red Hat·12:00 AM

Data Sourced

via Red Hat·12:00 AM

RemedyDescriptionAffected Software

Frequently Asked Questions

What conditions are needed for exploitation?

The issues are in the Font Server Client handling of encoding data. The provided information identifies an out-of-bounds read/write and a heap buffer overflow, but does not specify the required attacker access or delivery mechanism.

What is the potential impact?

One issue is identified as a privilege escalation via heap buffer overflow. The other is an out-of-bounds read/write in Font Server Client encoding handling; the provided data does not state its specific impact.

Which components should be included in remediation scope?

Review deployments of both X.Org libXfont2 and X.Org libXfonts2. The advisory identifies security fixes affecting the libXfont2 runtime library and names vulnerabilities in both component descriptions.

RHSA-2026:55446: Important: libXfont2 security update

Affected Software

Event History

Frequently Asked Questions

What conditions are needed for exploitation?

What is the potential impact?

Which components should be included in remediation scope?

Company

Resources

Contact

Frequently Asked Questions

What conditions are needed for exploitation?

What is the potential impact?

Which components should be included in remediation scope?