CVE-2026-94286

Out-of-bounds read in libXtst's RECORD reply parser

Published Sep 28, 2026 CVSS 3.1 · 7.1 High EPSS < 1% KEV · Not listed
Description
An out-of-bounds read in libXtst's RECORD reply parser in libXtst before 1.2.6 could be used by malicious X servers to crash attached X clients.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Ubuntu USN Ubuntu USN USN-8939-1 libXtst vulnerabilities
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description An out-of-bounds read in libXtst's RECORD reply parser in libXtst before 1.2.6 could be used by malicious X servers to crash attached X clients.
Title Out-of-bounds read in libXtst's RECORD reply parser
First Time appeared X.org
X.org libxtst
Weaknesses CWE-126
CPEs cpe:2.3:a:x.org:libxtst:*:*:*:*:*:*:*:*
Vendors & Products X.org
X.org libxtst
References
Metrics cvssV3_1

{'score': 7.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
suse
Published
Updated
Sep 30, 2026, 1:02 PM
Reserved
Sep 21, 2026, 9:33 AM
Status
Awaiting Analysis
Published
Sep 28, 2026, 9:17 AM
Modified
Sep 30, 2026, 1:17 PM
Severity
Important
Public date
Sep 28, 2026, 8:50 AM