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 addresses three security vulnerabilities in TigerVNC related components within Red Hat Enterprise Linux 7 Extended Lifecycle Support. The first two are use-after-free vulnerabilities: one in the XPresentNotify structure creation in xmayland (CVE-2025-62229) and another in Xkb client resource removal in xwayland (CVE-2025-62230). The third vulnerability is a value overflow in the XkbSetCompatMap() function in xmayland (CVE-2025-62231). These issues could potentially lead to memory corruption or instability. Red Hat has released updated tigervnc packages to fix these vulnerabilities.
Potential Impact
The vulnerabilities involve use-after-free and value overflow conditions in critical components of the TigerVNC suite, which could lead to memory corruption or other unintended behavior. While the exact impact details and exploitability are not provided, such vulnerabilities typically pose risks of denial of service or potential code execution under certain conditions. No known exploits in the wild have been reported at this time.
Mitigation Recommendations
Red Hat has released updated tigervnc packages for Red Hat Enterprise Linux 7 Extended Lifecycle Support that address these vulnerabilities. Users should apply the security update referenced in Red Hat Advisory RHSA-2025:22096 to remediate these issues. For detailed update instructions, refer to https://access.redhat.com/articles/11258. Patch status is confirmed as an official fix available from Red Hat.
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 addresses three security vulnerabilities in TigerVNC related components within Red Hat Enterprise Linux 7 Extended Lifecycle Support. The first two are use-after-free vulnerabilities: one in the XPresentNotify structure creation in xmayland (CVE-2025-62229) and another in Xkb client resource removal in xwayland (CVE-2025-62230). The third vulnerability is a value overflow in the XkbSetCompatMap() function in xmayland (CVE-2025-62231). These issues could potentially lead to memory corruption or instability. Red Hat has released updated tigervnc packages to fix these vulnerabilities.
Potential Impact
The vulnerabilities involve use-after-free and value overflow conditions in critical components of the TigerVNC suite, which could lead to memory corruption or other unintended behavior. While the exact impact details and exploitability are not provided, such vulnerabilities typically pose risks of denial of service or potential code execution under certain conditions. No known exploits in the wild have been reported at this time.
Mitigation Recommendations
Red Hat has released updated tigervnc packages for Red Hat Enterprise Linux 7 Extended Lifecycle Support that address these vulnerabilities. Users should apply the security update referenced in Red Hat Advisory RHSA-2025:22096 to remediate these issues. For detailed update instructions, refer to https://access.redhat.com/articles/11258. Patch status is confirmed as an official fix available from Red Hat.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2025:22096
- Cve Count
- 3
- Additional Cves
- ["CVE-2025-62230","CVE-2025-62231"]
- Cvss Version
- null
Threat ID: 6a3da1da4853345fc1828c9c
Added to database: 06/25/2026, 21:47:06 UTC
Last enriched: 06/25/2026, 22:20:14 UTC
Last updated: 07/02/2026, 16:51:10 UTC
Views: 6
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