Red Hat Security Advisory: tigervnc security update
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: xmayland: Use-after-free in XPresentNotify structure creation (CVE-2025-62229) * xorg: xwayland: Use-after-free in Xkb client resource removal (CVE-2025-62230) * xorg: xmayland: Value overflow in XkbSetCompatMap() (CVE-2025-62231) 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.
AI Analysis
Technical Summary
TigerVNC, a suite of VNC servers and clients used for remote desktop access, contains three security vulnerabilities in its Xorg components: a use-after-free in XPresentNotify structure creation (CVE-2025-62229), a use-after-free in Xkb client resource removal (CVE-2025-62230), and a value overflow in XkbSetCompatMap() (CVE-2025-62231). These issues were addressed by Red Hat in updated tigervnc packages for Red Hat Enterprise Linux Server 6 Extended Lifecycle Support. The advisory classifies the impact as Important and references the CVE pages for detailed scoring and impact information. The vulnerabilities relate to memory corruption and resource management flaws in the Xorg server components used by tigervnc.
Potential Impact
The vulnerabilities involve use-after-free conditions and a value overflow in Xorg components used by tigervnc, which could potentially lead to memory corruption or unexpected behavior. The advisory rates the security impact as Important, indicating a significant risk if exploited. No known exploits in the wild have been reported at the time of the advisory. The affected product is Red Hat Enterprise Linux Server 6 Extended Lifecycle Support versions running tigervnc.
Mitigation Recommendations
Red Hat has released updated tigervnc packages that address these vulnerabilities. Users of Red Hat Enterprise Linux Server 6 Extended Lifecycle Support should apply the provided security update (tigervnc-1.1.0-25.el6_10.15) to remediate these issues. Detailed update instructions are available at https://access.redhat.com/articles/11258. Since this is an official Red Hat advisory with an available update, applying the update is the recommended mitigation.
Red Hat Security Advisory: tigervnc security update
Description
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: xmayland: Use-after-free in XPresentNotify structure creation (CVE-2025-62229) * xorg: xwayland: Use-after-free in Xkb client resource removal (CVE-2025-62230) * xorg: xmayland: Value overflow in XkbSetCompatMap() (CVE-2025-62231) 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
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
TigerVNC, a suite of VNC servers and clients used for remote desktop access, contains three security vulnerabilities in its Xorg components: a use-after-free in XPresentNotify structure creation (CVE-2025-62229), a use-after-free in Xkb client resource removal (CVE-2025-62230), and a value overflow in XkbSetCompatMap() (CVE-2025-62231). These issues were addressed by Red Hat in updated tigervnc packages for Red Hat Enterprise Linux Server 6 Extended Lifecycle Support. The advisory classifies the impact as Important and references the CVE pages for detailed scoring and impact information. The vulnerabilities relate to memory corruption and resource management flaws in the Xorg server components used by tigervnc.
Potential Impact
The vulnerabilities involve use-after-free conditions and a value overflow in Xorg components used by tigervnc, which could potentially lead to memory corruption or unexpected behavior. The advisory rates the security impact as Important, indicating a significant risk if exploited. No known exploits in the wild have been reported at the time of the advisory. The affected product is Red Hat Enterprise Linux Server 6 Extended Lifecycle Support versions running tigervnc.
Mitigation Recommendations
Red Hat has released updated tigervnc packages that address these vulnerabilities. Users of Red Hat Enterprise Linux Server 6 Extended Lifecycle Support should apply the provided security update (tigervnc-1.1.0-25.el6_10.15) to remediate these issues. Detailed update instructions are available at https://access.redhat.com/articles/11258. Since this is an official Red Hat advisory with an available update, applying the update is the recommended mitigation.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2025:22667
- Cve Count
- 3
- Additional Cves
- ["CVE-2025-62230","CVE-2025-62231"]
- Cvss Version
- null
Threat ID: 6a3da1da4853345fc1828c70
Added to database: 06/25/2026, 21:47:06 UTC
Last enriched: 06/25/2026, 22:19:51 UTC
Last updated: 07/02/2026, 20:51:18 UTC
Views: 6
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