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High RHSA-2026:98546 9 CVEs

Red Hat Security Advisory: xorg-x11-server-Xwayland security update

Published Nov 13, 2026 · Updated Nov 13, 2026

Ecosystem: Red Hat

Fixed packages 4

ReleasePackageFixed in
Red Hat · RHEL 10.0 EUS enterprise_linux_eus:10.0 xorg-x11-server-Xwayland 0:24.1.5-6.el10_0.3
Red Hat · RHEL 10.0 EUS enterprise_linux_eus:10.0 xorg-x11-server-Xwayland-debuginfo 0:24.1.5-6.el10_0.3
Red Hat · RHEL 10.0 EUS enterprise_linux_eus:10.0 xorg-x11-server-Xwayland-debugsource 0:24.1.5-6.el10_0.3
Red Hat · RHEL 10.0 EUS enterprise_linux_eus:10.0 xorg-x11-server-Xwayland-devel 0:24.1.5-6.el10_0.3

Vulnerabilities 9

  • High 8.5
    CVE-2026-93517

    X.Org Server GLX RenderLarge Heap Buffer Overflow

    A heap buffer overflow in handling GLX RenderLarge request where dataBytes exceeds cmdlen in X.org X server before 21.1.25 and XWayland before 24.1.14 that could be be triggered by an authenticated X client could cause crashes or code execution in X server co…

    X.Org x.orgg xwayland xorg-x11-server Debian Ubuntu Azure Linux Alpine
  • High 7.8
    CVE-2026-88812

    X.Org Server XKB SetGeometry TextDoodad Double Free

    A double free in XKB SetGeometryin X.Org X Server before 21.1.25 and X Wayland before 24.1.14 could be used by attached clients to cause a crash or potentially code in the x server context.

    X.Org xwayland xorg-x11-server xorg-server Debian Ubuntu Azure Linux Alpine
  • High 7.8
    CVE-2026-93518

    X.Org Server XKB ResizeKeyType Numeric Truncation

    An integer truncation issue in XkbResizeKeyType() that could lead to a heap buffer overflow by authenticated X clients in X.org X server before 21.1.25 and XWayland before 24.1.14 could be exploited for crashes or potential code execution in the X server.

    X.Org xwayland xorg-x11-server xorg-server Debian Ubuntu Azure Linux Alpine
  • High 7.8
    CVE-2026-93519

    X.Org Server XFixes Pointer Barrier Event List Buffer Overflow

    A buffer overflow when handling pointer barriers in the XFIXES extension in X.Org X server before 21.1.25 and XWayland before 24.1.14 could be used by authenticated X clients to crash or potentially execute code in X server context.

    X.Org x.orgg xorg-x11-server xwayland Debian Ubuntu Azure Linux Alpine
  • High 7.8
    CVE-2026-93520

    X.Org Server XKB ChangeKeycodeRange Heap Out-of-Bounds Write

    A heap buffer overflow caused by mismatching size calculations between XkbAllocNames and ChangeKeycodeRange in X.org X server before 2.1.25 and XWayland before 24.1.14 could be used by authenticated X clients to crash or potentially execute code in X server c…

    X.Org xwayland xorg-x11-server xorg-server Debian Ubuntu Azure Linux Alpine
  • High 7.8
    CVE-2026-93521

    X.Org Server RandR ChangeProviderProperty Heap Buffer Overflow

    A buffer overflow in RandR ChangeProviderProperty requests in X.Org X Server before 2.1.25 and XWayland before 24.4.14 could be used by authenticated X clients to crash or execute code within the X server context.

    X.Org xwayland xorg-x11-server xorg-server Debian Ubuntu Azure Linux Alpine
  • High 7.8
    CVE-2026-93522

    X.Org Server Glamor CopyArea Heap Buffer Overflow

    A heap buffer overflow caused by mismatched size usage in CopyArea CPU-to-FBO path in X.Org X Server before 21.1.15 and XWayland before 24.1.14 could be used by authenticated X clients to crash or potentially execute code in the X server context.

    X.Org xwayland xorg-x11-server xorg-server Debian Ubuntu Azure Linux Alpine
  • High 7.8
    CVE-2026-93523

    X.Org Server XInput2 PassiveUngrabDevice Out-of-Bounds Write

    A heap buffer overflow caused by a XIPassiveUngrabDevice request with an out-of-range modifier value in X.Org X Server before 21.1.15 and XWayland before 24.1.14 could be used by authenticated X clients to crash or potentially execute code in X server context.

    X.Org xwayland xorg-x11-server xorg-server Debian Ubuntu Azure Linux Alpine
  • Medium 5.5
    CVE-2026-93516

    .Org Server XInput Passive Grab Use-After-Free

    A use-after-free caused by lack of lifecycle management when adding / removing XInput master devices in X.org X Server before 21.1.25 and XWayland before 24.1.14 could be used by authenticated X Clients to crash the X server or potentially execute code in X s…

    X.Org xwayland xorg-x11-server xorg-server Debian Ubuntu Azure Linux Alpine

References

  • article
    https://access.redhat.com/security/updates/classification/#important
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2545161
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2545164
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2545174
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2545177
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2545178
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2545246
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2545860
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2545887
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2545908
  • advisory
    https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_98546.json
  • report
    https://access.redhat.com/security/cve/CVE-2026-88812
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-88812
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-88812
  • report
    https://access.redhat.com/security/cve/CVE-2026-93516
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-93516
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-93516
  • report
    https://access.redhat.com/security/cve/CVE-2026-93517
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-93517
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-93517
  • report
    https://access.redhat.com/security/cve/CVE-2026-93518
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-93518
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-93518
  • report
    https://access.redhat.com/security/cve/CVE-2026-93519
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-93519
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-93519
  • report
    https://access.redhat.com/security/cve/CVE-2026-93520
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-93520
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-93520
  • report
    https://access.redhat.com/security/cve/CVE-2026-93521
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-93521
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-93521
  • report
    https://access.redhat.com/security/cve/CVE-2026-93522
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-93522
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-93522
  • report
    https://access.redhat.com/security/cve/CVE-2026-93523
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-93523
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-93523