Amazon Linux 2027 Preview Security Advisory: ALAS2027-2026-227
Advisory Released Date: 2026-10-26
Advisory Updated Date: 2026-11-02
Severity:
Important
Issue Overview:
Package updates are available for Amazon Linux 2027 that fix the following vulnerabilities:
CVE-2026-94286:
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.
Affected Packages:
libXtst
Issue Correction:
Run dnf update libXtst --releasever 2027.0.20261026 or dnf update --advisory ALAS2027-2026-227 --releasever 2027.0.20261026 to update your system.
New Packages:
aarch64:
libXtst-debuginfo-1.2.5-3.amzn2027.0.1.aarch64
libXtst-1.2.5-3.amzn2027.0.1.aarch64
libXtst-debugsource-1.2.5-3.amzn2027.0.1.aarch64
libXtst-devel-1.2.5-3.amzn2027.0.1.aarch64
src:
libXtst-1.2.5-3.amzn2027.0.1.src
x86_64:
libXtst-debugsource-1.2.5-3.amzn2027.0.1.x86_64
libXtst-debuginfo-1.2.5-3.amzn2027.0.1.x86_64
libXtst-devel-1.2.5-3.amzn2027.0.1.x86_64
libXtst-1.2.5-3.amzn2027.0.1.x86_64