RHSA-2026:55446: Important: libXfont2 security update
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
Event History
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.