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CVE-2026-109088

libXtst RECORD EnableContext Reply Endless Loop

A malicious X server could send malformed  RECORD EnableContext reolies that can cause a X client using the parse_reply_call_callback function in libXtst before 1.2.6 to enter a endless loop.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
Vendors
X.org
Products
Libxtst
CVE-2026-94286

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

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.

CVSS 3.1 · 7.1 High EPSS < 1% KEV · Not listed
Vendors
X.org
Products
Libxtst
CVE-2016-7952

libXtst: Insufficient validation of server responses result in various data mishandlings

X.org libXtst before 1.2.3 allows remote X servers to cause a denial of service (infinite loop) via a reply in the (1) XRecordStartOfData, (2) XRecordEndOfData, or (3) XRecordClientDied category without a client sequence and with attached data.

CVSS 3.0 · 7.5 High EPSS 2.3% KEV · Not listed
Vendors
Fedoraproject X.org
Products
Fedora Libxtst