Amazon Linux 2 (EOS) Security Advisory: ALAS2-2026-4012
Advisory Released Date: 2026-10-24
Advisory Updated Date: 2026-10-26
Severity:
Important
Issue Overview:
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. (CVE-2026-94286)
Affected Packages:
libXtst
Note:
This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.
Issue Correction:
Run yum update libXtst or yum update --advisory ALAS2-2026-4012 to update your system.
New Packages:
aarch64:
libXtst-1.2.3-1.amzn2.0.3.aarch64
libXtst-devel-1.2.3-1.amzn2.0.3.aarch64
libXtst-debuginfo-1.2.3-1.amzn2.0.3.aarch64
i686:
libXtst-1.2.3-1.amzn2.0.3.i686
libXtst-devel-1.2.3-1.amzn2.0.3.i686
libXtst-debuginfo-1.2.3-1.amzn2.0.3.i686
src:
libXtst-1.2.3-1.amzn2.0.3.src
x86_64:
libXtst-1.2.3-1.amzn2.0.3.x86_64
libXtst-devel-1.2.3-1.amzn2.0.3.x86_64
libXtst-debuginfo-1.2.3-1.amzn2.0.3.x86_64