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libXtst 1.2.4-1 can cause X client crashes

published 1 month ago
Summary

The libXtst library version 1.2.4-1 may read data outside its limits when communicating with a malicious X server, which can force the connected X client programs to stop working. This can disrupt any applications that rely on the X Window System. Upgrade libXtst to version 1.2.6 or later to stop the crashes.

What to do

The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.

Affected software
Ecosystem VendorProductAffected versions
Azure Linux:3 azure libxtst <= 1.2.4-1
Original advisory text
CVE-2026-94286 affecting package libXtst 1.2.4-1
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.
Timeline
Published28 Sep 2026
Updated30 Sep 2026
First seen30 Sep 2026
Sources
AZL-104969 · OSV
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