Amazon Linux 2 (EOS) Security Advisory: ALAS2-2026-3977
Advisory Released Date: 2026-10-12
Advisory Updated Date: 2026-10-12
Severity:
Important
Issue Overview:
A malicious X server could exploit a buffer overflow in libX11 before 1.8.14 during handling of XkbGetMap overflowing the key_sym_map. (CVE-2026-88806)
Affected Packages:
libX11
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 libX11 or yum update --advisory ALAS2-2026-3977 to update your system.
New Packages:
aarch64:
libX11-1.6.7-3.amzn2.0.6.aarch64
libX11-devel-1.6.7-3.amzn2.0.6.aarch64
libX11-debuginfo-1.6.7-3.amzn2.0.6.aarch64
i686:
libX11-1.6.7-3.amzn2.0.6.i686
libX11-devel-1.6.7-3.amzn2.0.6.i686
libX11-debuginfo-1.6.7-3.amzn2.0.6.i686
noarch:
libX11-common-1.6.7-3.amzn2.0.6.noarch
src:
libX11-1.6.7-3.amzn2.0.6.src
x86_64:
libX11-1.6.7-3.amzn2.0.6.x86_64
libX11-devel-1.6.7-3.amzn2.0.6.x86_64
libX11-debuginfo-1.6.7-3.amzn2.0.6.x86_64