RLSA-2026:98499: Important: libXtst security update
X.Org X11 libXtst runtime library
Security Fix(es):
libXtst: libXtst: Denial of Service via out-of-bounds read in RECORD reply parser (CVE-2026-94286)
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
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
rocky-linux/libXtstto a version that resolves this vulnerability.Fixed in 0:1.2.3-16.el9_8.1
Event History
Frequently Asked Questions
What must an attacker be able to do to exploit this issue?
The CVSS vector indicates network attack access, low attack complexity, no required privileges, and required user interaction. The issue is an out-of-bounds read in the libXtst RECORD reply parser that can lead to denial of service.
What is the primary impact if exploitation succeeds?
Availability is rated high, meaning successful exploitation can cause a denial-of-service condition. Confidentiality impact is low, while integrity impact is rated none.
Which Rocky Linux component should be checked for remediation?
Check systems using the Rocky Linux libXtst runtime library package. This advisory identifies libXtst as the affected software.