RHSA-2026:98538: Important: tigervnc security update

Published Nov 11, 2026
·
Updated

Virtual Network Computing (VNC) is a remote display system which allows users to view a computing desktop environment not only on the machine where it is running, but from anywhere on the Internet and from a wide variety of machine architectures. TigerVNC is a suite of VNC servers and clients.Security Fix(es): xorg-x11-server: xorg-x11-server: Arbitrary code execution via use-after-free in passive grab handling (CVE-2026-93516) xorg-x11-server: xorg-x11-server: Privilege escalation via crafted RandR provider property requests (CVE-2026-93521) xorg-x11-server: xwayland: xorg-x11-server: Arbitrary code execution via double-free in XKB geometry handling (CVE-2026-88812) xorg-x11-server: xorg-x11-server: Out-of-bounds write via unvalidated modifier in ProcXIPassiveUngrabDevice (CVE-2026-93523) xorg-x11-server: xorg-x11-server: arbitrary code execution via GLX RenderLarge heap-based buffer overflow (CVE-2026-93517) xorg-x11-server: xorg-x11-server: arbitrary code execution via integer truncation during keyboard mapping resize (CVE-2026-93518) xorg-x11-server: xorg-x11-server: Arbitrary code execution via buffer overflow in inputconstraincursor() (CVE-2026-93519) xorg-x11-server: xorg-x11-server: arbitrary code execution via out-of-bounds write in XKB keycode handling (CVE-2026-93520) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Affected Software

39 affected componentsFixes available
redhat/tigervnc<1.16.2-4.el9_9.1
1.16.2-4.el9_9.1
redhat/tigervnc<1.16.2-4.el9_9.1
1.16.2-4.el9_9.1
redhat/tigervnc-debuginfo<1.16.2-4.el9_9.1
1.16.2-4.el9_9.1
redhat/tigervnc-debugsource<1.16.2-4.el9_9.1
1.16.2-4.el9_9.1
redhat/tigervnc-icons<1.16.2-4.el9_9.1
1.16.2-4.el9_9.1
redhat/tigervnc-license<1.16.2-4.el9_9.1
1.16.2-4.el9_9.1
redhat/tigervnc-selinux<1.16.2-4.el9_9.1
1.16.2-4.el9_9.1
redhat/tigervnc-server<1.16.2-4.el9_9.1
1.16.2-4.el9_9.1
redhat/tigervnc-server-debuginfo<1.16.2-4.el9_9.1
1.16.2-4.el9_9.1
redhat/tigervnc-server-minimal<1.16.2-4.el9_9.1
1.16.2-4.el9_9.1
redhat/tigervnc-server-minimal-debuginfo<1.16.2-4.el9_9.1
1.16.2-4.el9_9.1
redhat/tigervnc-server-module<1.16.2-4.el9_9.1
1.16.2-4.el9_9.1
redhat/tigervnc-server-module-debuginfo<1.16.2-4.el9_9.1
1.16.2-4.el9_9.1
redhat/tigervnc-debuginfo<1.16.2-4.el9_9.1
1.16.2-4.el9_9.1
redhat/tigervnc-debugsource<1.16.2-4.el9_9.1
1.16.2-4.el9_9.1
redhat/tigervnc-server<1.16.2-4.el9_9.1
1.16.2-4.el9_9.1
redhat/tigervnc-server-debuginfo<1.16.2-4.el9_9.1
1.16.2-4.el9_9.1
redhat/tigervnc-server-minimal<1.16.2-4.el9_9.1
1.16.2-4.el9_9.1
redhat/tigervnc-server-minimal-debuginfo<1.16.2-4.el9_9.1
1.16.2-4.el9_9.1
redhat/tigervnc-server-module<1.16.2-4.el9_9.1
1.16.2-4.el9_9.1
redhat/tigervnc-server-module-debuginfo<1.16.2-4.el9_9.1
1.16.2-4.el9_9.1
redhat/tigervnc<1.16.2-4.el9_9.1
1.16.2-4.el9_9.1
redhat/tigervnc-debuginfo<1.16.2-4.el9_9.1
1.16.2-4.el9_9.1
redhat/tigervnc-debugsource<1.16.2-4.el9_9.1
1.16.2-4.el9_9.1
redhat/tigervnc-server<1.16.2-4.el9_9.1
1.16.2-4.el9_9.1
redhat/tigervnc-server-debuginfo<1.16.2-4.el9_9.1
1.16.2-4.el9_9.1
redhat/tigervnc-server-minimal<1.16.2-4.el9_9.1
1.16.2-4.el9_9.1
redhat/tigervnc-server-minimal-debuginfo<1.16.2-4.el9_9.1
1.16.2-4.el9_9.1
redhat/tigervnc-server-module<1.16.2-4.el9_9.1
1.16.2-4.el9_9.1
redhat/tigervnc-server-module-debuginfo<1.16.2-4.el9_9.1
1.16.2-4.el9_9.1
redhat/tigervnc<1.16.2-4.el9_9.1.aa
1.16.2-4.el9_9.1.aa
redhat/tigervnc-debuginfo<1.16.2-4.el9_9.1.aa
1.16.2-4.el9_9.1.aa
redhat/tigervnc-debugsource<1.16.2-4.el9_9.1.aa
1.16.2-4.el9_9.1.aa
redhat/tigervnc-server<1.16.2-4.el9_9.1.aa
1.16.2-4.el9_9.1.aa
redhat/tigervnc-server-debuginfo<1.16.2-4.el9_9.1.aa
1.16.2-4.el9_9.1.aa
redhat/tigervnc-server-minimal<1.16.2-4.el9_9.1.aa
1.16.2-4.el9_9.1.aa
redhat/tigervnc-server-minimal-debuginfo<1.16.2-4.el9_9.1.aa
1.16.2-4.el9_9.1.aa
redhat/tigervnc-server-module<1.16.2-4.el9_9.1.aa
1.16.2-4.el9_9.1.aa
redhat/tigervnc-server-module-debuginfo<1.16.2-4.el9_9.1.aa
1.16.2-4.el9_9.1.aa

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade redhat/tigervnc to a version that resolves this vulnerability.

    Fixed in 1.16.2-4.el9_9.1
  2. Upgrade

    Upgrade redhat/tigervnc-debuginfo to a version that resolves this vulnerability.

    Fixed in 1.16.2-4.el9_9.1
  3. Upgrade

    Upgrade redhat/tigervnc-debugsource to a version that resolves this vulnerability.

    Fixed in 1.16.2-4.el9_9.1
  4. Upgrade

    Upgrade redhat/tigervnc-icons to a version that resolves this vulnerability.

    Fixed in 1.16.2-4.el9_9.1
  5. Upgrade

    Upgrade redhat/tigervnc-license to a version that resolves this vulnerability.

    Fixed in 1.16.2-4.el9_9.1
  6. Upgrade

    Upgrade redhat/tigervnc-selinux to a version that resolves this vulnerability.

    Fixed in 1.16.2-4.el9_9.1
  7. Upgrade

    Upgrade redhat/tigervnc-server to a version that resolves this vulnerability.

    Fixed in 1.16.2-4.el9_9.1
  8. Upgrade

    Upgrade redhat/tigervnc-server-debuginfo to a version that resolves this vulnerability.

    Fixed in 1.16.2-4.el9_9.1
  9. Upgrade

    Upgrade redhat/tigervnc-server-minimal to a version that resolves this vulnerability.

    Fixed in 1.16.2-4.el9_9.1
  10. Upgrade

    Upgrade redhat/tigervnc-server-minimal-debuginfo to a version that resolves this vulnerability.

    Fixed in 1.16.2-4.el9_9.1
  11. Upgrade

    Upgrade redhat/tigervnc-server-module to a version that resolves this vulnerability.

    Fixed in 1.16.2-4.el9_9.1
  12. Upgrade

    Upgrade redhat/tigervnc-server-module-debuginfo to a version that resolves this vulnerability.

    Fixed in 1.16.2-4.el9_9.1
  13. Upgrade

    Upgrade redhat/tigervnc to a version that resolves this vulnerability.

    Fixed in 1.16.2-4.el9_9.1.aa
  14. Upgrade

    Upgrade redhat/tigervnc-debuginfo to a version that resolves this vulnerability.

    Fixed in 1.16.2-4.el9_9.1.aa
  15. Upgrade

    Upgrade redhat/tigervnc-debugsource to a version that resolves this vulnerability.

    Fixed in 1.16.2-4.el9_9.1.aa
  16. Upgrade

    Upgrade redhat/tigervnc-server to a version that resolves this vulnerability.

    Fixed in 1.16.2-4.el9_9.1.aa
  17. Upgrade

    Upgrade redhat/tigervnc-server-debuginfo to a version that resolves this vulnerability.

    Fixed in 1.16.2-4.el9_9.1.aa
  18. Upgrade

    Upgrade redhat/tigervnc-server-minimal to a version that resolves this vulnerability.

    Fixed in 1.16.2-4.el9_9.1.aa
  19. Upgrade

    Upgrade redhat/tigervnc-server-minimal-debuginfo to a version that resolves this vulnerability.

    Fixed in 1.16.2-4.el9_9.1.aa
  20. Upgrade

    Upgrade redhat/tigervnc-server-module to a version that resolves this vulnerability.

    Fixed in 1.16.2-4.el9_9.1.aa
  21. Upgrade

    Upgrade redhat/tigervnc-server-module-debuginfo to a version that resolves this vulnerability.

    Fixed in 1.16.2-4.el9_9.1.aa

Event History

Nov 11, 2026
Advisory Published
via Red Hat·12:00 AM
Data Sourced
via Red Hat·12:00 AM
RemedyDescriptionAffected Software

Frequently Asked Questions

1

Which TigerVNC package variants are covered?

The listed packages are tigervnc, tigervnc-debuginfo, tigervnc-debugsource, tigervnc-server, tigervnc-server-debuginfo, tigervnc-server-minimal, tigervnc-server-minimal-debuginfo, and tigervnc-server-module.

2

Does the advisory specify affected versions, default exposure, or exploitation prerequisites?

No. The provided information does not identify affected version ranges, whether default configurations are vulnerable, or the access and configuration conditions required to exploit the listed issues.

Company

Resources

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