x.org libXtst vulnerabilities

Latest x.org libXtst CVEs

Newest publication first

1. CVE-2026-109088 libXtst RECORD EnableContext Reply Endless Loop

   Published 2026-10-27

   Medium·CVSS 6.5 EPSS 0.27%

   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.

2. CVE-2026-94286 Out-of-bounds read in libXtst's RECORD reply parser

   Published 2026-09-28

   High·CVSS 7.1 EPSS 0.20%

   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.

3. CVE-2016-7952 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 witho...

   Published 2016-12-13

   High·CVSS 7.5 EPSS 2.3%

   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.

Sources: CVE.org, NVD, CISA KEV, FIRST EPSS, OSV and public exploit-reference metadata. Product matching comes from the published CVE records. A proof-of-concept means public code exists; it is not evidence of exploitation.