ALAS2-2026-4108

Amazon Linux 2 (EOS) Security Advisory: ALAS2-2026-4108
Advisory Released Date: 2026-11-12
Advisory Updated Date: 2026-11-12
Severity: Important
Issue Overview:

A flaw in the X.Org Server's handling of EDID Display-Range descriptors can result in an out-of-bounds write, potentially leading to server crashes or memory corruption. (CVE-2026-109091)

A bounds-checking flaw in the X.Org Server's XvShmPutImage handling can result in an out-of-bounds read or write, potentially leading to server crashes or memory corruption. (CVE-2026-109092)

A flaw in the X.Org Server's XTestFakeInput handling can result in a stack out-of-bounds write, potentially leading to server crashes or stack memory corruption. (CVE-2026-109093)

An integer overflow flaw in the X.Org Server's glamor Xv image size computation can result in out-of-bounds reads, potentially leading to server crashes or unintended memory access. (CVE-2026-109095)

A flaw in the X.Org Server's XvPutImage length validation can allow requests with missing image data to be processed, potentially leading to server crashes or misbehavior. (CVE-2026-109096)

A flaw in the X.Org Server's XvQueryImageAttributes reply handling can result in clients receiving an incorrect data size value, potentially leading to improper buffer allocation or usage. (CVE-2026-109903)


Affected Packages:

xorg-x11-server


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 xorg-x11-server or yum update --advisory ALAS2-2026-4108 to update your system.

New Packages:
aarch64:
    xorg-x11-server-common-1.20.4-22.amzn2.0.15.aarch64
    xorg-x11-server-Xorg-1.20.4-22.amzn2.0.15.aarch64
    xorg-x11-server-Xnest-1.20.4-22.amzn2.0.15.aarch64
    xorg-x11-server-Xdmx-1.20.4-22.amzn2.0.15.aarch64
    xorg-x11-server-Xvfb-1.20.4-22.amzn2.0.15.aarch64
    xorg-x11-server-Xephyr-1.20.4-22.amzn2.0.15.aarch64
    xorg-x11-server-Xwayland-1.20.4-22.amzn2.0.15.aarch64
    xorg-x11-server-devel-1.20.4-22.amzn2.0.15.aarch64
    xorg-x11-server-debuginfo-1.20.4-22.amzn2.0.15.aarch64

i686:
    xorg-x11-server-common-1.20.4-22.amzn2.0.15.i686
    xorg-x11-server-Xorg-1.20.4-22.amzn2.0.15.i686
    xorg-x11-server-Xnest-1.20.4-22.amzn2.0.15.i686
    xorg-x11-server-Xdmx-1.20.4-22.amzn2.0.15.i686
    xorg-x11-server-Xvfb-1.20.4-22.amzn2.0.15.i686
    xorg-x11-server-Xephyr-1.20.4-22.amzn2.0.15.i686
    xorg-x11-server-Xwayland-1.20.4-22.amzn2.0.15.i686
    xorg-x11-server-devel-1.20.4-22.amzn2.0.15.i686
    xorg-x11-server-debuginfo-1.20.4-22.amzn2.0.15.i686

noarch:
    xorg-x11-server-source-1.20.4-22.amzn2.0.15.noarch

src:
    xorg-x11-server-1.20.4-22.amzn2.0.15.src

x86_64:
    xorg-x11-server-common-1.20.4-22.amzn2.0.15.x86_64
    xorg-x11-server-Xorg-1.20.4-22.amzn2.0.15.x86_64
    xorg-x11-server-Xnest-1.20.4-22.amzn2.0.15.x86_64
    xorg-x11-server-Xdmx-1.20.4-22.amzn2.0.15.x86_64
    xorg-x11-server-Xvfb-1.20.4-22.amzn2.0.15.x86_64
    xorg-x11-server-Xephyr-1.20.4-22.amzn2.0.15.x86_64
    xorg-x11-server-Xwayland-1.20.4-22.amzn2.0.15.x86_64
    xorg-x11-server-devel-1.20.4-22.amzn2.0.15.x86_64
    xorg-x11-server-debuginfo-1.20.4-22.amzn2.0.15.x86_64

Additional References

Red Hat: CVE-2026-109091, CVE-2026-109092, CVE-2026-109093, CVE-2026-109095, CVE-2026-109096, CVE-2026-109903

Mitre: CVE-2026-109091, CVE-2026-109092, CVE-2026-109093, CVE-2026-109095, CVE-2026-109096, CVE-2026-109903