RHSA-2026:99623: Important: tigervnc security update
Important: tigervnc security update
Other sources
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.
— Red Hat
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
redhat/tigervncto a version that resolves this vulnerability.Fixed in 1.15.0-11.el8_10 - Upgrade
Upgrade
redhat/tigervnc-debuginfoto a version that resolves this vulnerability.Fixed in 1.15.0-11.el8_10 - Upgrade
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redhat/tigervnc-debugsourceto a version that resolves this vulnerability.Fixed in 1.15.0-11.el8_10 - Upgrade
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redhat/tigervnc-iconsto a version that resolves this vulnerability.Fixed in 1.15.0-11.el8_10 - Upgrade
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redhat/tigervnc-licenseto a version that resolves this vulnerability.Fixed in 1.15.0-11.el8_10 - Upgrade
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redhat/tigervnc-selinuxto a version that resolves this vulnerability.Fixed in 1.15.0-11.el8_10 - Upgrade
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redhat/tigervnc-serverto a version that resolves this vulnerability.Fixed in 1.15.0-11.el8_10 - Upgrade
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redhat/tigervnc-server-debuginfoto a version that resolves this vulnerability.Fixed in 1.15.0-11.el8_10 - Upgrade
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redhat/tigervnc-server-minimalto a version that resolves this vulnerability.Fixed in 1.15.0-11.el8_10 - Upgrade
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redhat/tigervnc-server-minimal-debuginfoto a version that resolves this vulnerability.Fixed in 1.15.0-11.el8_10 - Upgrade
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redhat/tigervnc-server-moduleto a version that resolves this vulnerability.Fixed in 1.15.0-11.el8_10 - Upgrade
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redhat/tigervnc-server-module-debuginfoto a version that resolves this vulnerability.Fixed in 1.15.0-11.el8_10 - Upgrade
Upgrade
redhat/tigervncto a version that resolves this vulnerability.Fixed in 1.15.0-11.el8_10.aa - Upgrade
Upgrade
redhat/tigervnc-debuginfoto a version that resolves this vulnerability.Fixed in 1.15.0-11.el8_10.aa - Upgrade
Upgrade
redhat/tigervnc-debugsourceto a version that resolves this vulnerability.Fixed in 1.15.0-11.el8_10.aa - Upgrade
Upgrade
redhat/tigervnc-serverto a version that resolves this vulnerability.Fixed in 1.15.0-11.el8_10.aa - Upgrade
Upgrade
redhat/tigervnc-server-debuginfoto a version that resolves this vulnerability.Fixed in 1.15.0-11.el8_10.aa - Upgrade
Upgrade
redhat/tigervnc-server-minimalto a version that resolves this vulnerability.Fixed in 1.15.0-11.el8_10.aa - Upgrade
Upgrade
redhat/tigervnc-server-minimal-debuginfoto a version that resolves this vulnerability.Fixed in 1.15.0-11.el8_10.aa - Upgrade
Upgrade
redhat/tigervnc-server-moduleto a version that resolves this vulnerability.Fixed in 1.15.0-11.el8_10.aa - Upgrade
Upgrade
redhat/tigervnc-server-module-debuginfoto a version that resolves this vulnerability.Fixed in 1.15.0-11.el8_10.aa
Event History
Frequently Asked Questions
Which components are included in the update?
The update covers tigervnc, tigervnc-server, tigervnc-server-minimal, tigervnc-server-module, and their listed debuginfo and debugsource packages.
What types of impact are addressed by the security fixes?
The listed fixes address arbitrary code execution, privilege escalation, an out-of-bounds write, buffer overflows, use-after-free issues, and a double-free issue in xorg-x11-server and Xwayland-related functionality.