Out-of-Bounds Read Vulnerability in libXtst Affects Users of X Client Software
CVE-2026-94286

7.1HIGH

Key Information:

Vendor

X.org

Status
Libxtst
Vendor
CVE Published:
28 September 2026

What is CVE-2026-94286?

An out-of-bounds read vulnerability exists in the RECORD reply parser of libXtst. This vulnerability allows malicious X servers to exploit the flaw and potentially crash connected X client applications. Users of versions prior to 1.2.6 are at risk, highlighting the importance of keeping software updated to mitigate security vulnerabilities.

Affected Version(s)

libXtst 0 < 1.2.6

References

https://gitlab.freedesktop.org/xorg/lib/libxtst/-/merge_r...
patch

CVSS V3.1

Score:
7.1
Severity:
HIGH
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

AISLE in partnership with Red Hat
.