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
This advisory covers three security vulnerabilities in TigerVNC related components within Red Hat Enterprise Linux 6 Extended Lifecycle Support. CVE-2025-62229 is a use-after-free vulnerability in the XPresentNotify structure creation in xmayland. CVE-2025-62230 is a use-after-free vulnerability in Xkb client resource removal in xwayland. CVE-2025-62231 is a value overflow vulnerability in the XkbSetCompatMap() function in xmayland. These vulnerabilities could potentially lead to memory corruption issues. Red Hat has issued an update to fix these vulnerabilities in TigerVNC packages for affected Red Hat Enterprise Linux 6 Extended Lifecycle Support variants.
Potential Impact
The vulnerabilities involve use-after-free and value overflow conditions in TigerVNC components, which could lead to memory corruption. This may allow an attacker to cause a denial of service or potentially execute arbitrary code. Red Hat has assigned an overall security impact rating of Important to these issues. There are no known exploits in the wild at this time.
Mitigation Recommendations
Red Hat has released security updates for TigerVNC in Red Hat Enterprise Linux 6 Extended Lifecycle Support to address these vulnerabilities. Users should apply the provided updates as described in the Red Hat advisory RHSA-2025:22667 and the referenced article https://access.redhat.com/articles/11258. No additional mitigation actions are specified by the vendor.
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
This advisory covers three security vulnerabilities in TigerVNC related components within Red Hat Enterprise Linux 6 Extended Lifecycle Support. CVE-2025-62229 is a use-after-free vulnerability in the XPresentNotify structure creation in xmayland. CVE-2025-62230 is a use-after-free vulnerability in Xkb client resource removal in xwayland. CVE-2025-62231 is a value overflow vulnerability in the XkbSetCompatMap() function in xmayland. These vulnerabilities could potentially lead to memory corruption issues. Red Hat has issued an update to fix these vulnerabilities in TigerVNC packages for affected Red Hat Enterprise Linux 6 Extended Lifecycle Support variants.
Potential Impact
The vulnerabilities involve use-after-free and value overflow conditions in TigerVNC components, which could lead to memory corruption. This may allow an attacker to cause a denial of service or potentially execute arbitrary code. Red Hat has assigned an overall security impact rating of Important to these issues. There are no known exploits in the wild at this time.
Mitigation Recommendations
Red Hat has released security updates for TigerVNC in Red Hat Enterprise Linux 6 Extended Lifecycle Support to address these vulnerabilities. Users should apply the provided updates as described in the Red Hat advisory RHSA-2025:22667 and the referenced article https://access.redhat.com/articles/11258. No additional mitigation actions are specified by the vendor.
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"]
Threat ID: 6a3da1da4853345fc1828c70
Added to database: 06/25/2026, 21:47:06 UTC
Last enriched: 07/12/2026, 10:51:30 UTC
Last updated: 09/10/2026, 19:36:51 UTC
Views: 50
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