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
The Red Hat security advisory RHSA-2025:19433 addresses three vulnerabilities in the xorg-x11-server package: CVE-2025-62229 (use-after-free in XPresentNotify structure creation in xmayland), CVE-2025-62230 (use-after-free in Xkb client resource removal in xwayland), and CVE-2025-62231 (value overflow in XkbSetCompatMap() in xmayland). These issues stem from improper memory management and integer handling, which can cause undefined behavior or crashes. The advisory covers multiple Red Hat Enterprise Linux 9 variants and architectures. Users are advised to apply the update after ensuring all previous errata are applied.
Potential Impact
The vulnerabilities involve use-after-free and integer overflow conditions in the xorg-x11-server components, which may lead to memory corruption or crashes. While no known exploits are reported in the wild, successful exploitation could affect system stability or security. The issues are rated moderate severity by Red Hat.
Mitigation Recommendations
Red Hat has released updated xorg-x11-server packages that fix these vulnerabilities. Users should apply the update as per the advisory RHSA-2025:19433 after confirming all prior relevant errata have been installed. No additional mitigation steps are indicated beyond applying the official update.
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
pkg:rpm/redhat/xorg-x11-serverRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Red Hat security advisory RHSA-2025:19433 addresses three vulnerabilities in the xorg-x11-server package: CVE-2025-62229 (use-after-free in XPresentNotify structure creation in xmayland), CVE-2025-62230 (use-after-free in Xkb client resource removal in xwayland), and CVE-2025-62231 (value overflow in XkbSetCompatMap() in xmayland). These issues stem from improper memory management and integer handling, which can cause undefined behavior or crashes. The advisory covers multiple Red Hat Enterprise Linux 9 variants and architectures. Users are advised to apply the update after ensuring all previous errata are applied.
Potential Impact
The vulnerabilities involve use-after-free and integer overflow conditions in the xorg-x11-server components, which may lead to memory corruption or crashes. While no known exploits are reported in the wild, successful exploitation could affect system stability or security. The issues are rated moderate severity by Red Hat.
Mitigation Recommendations
Red Hat has released updated xorg-x11-server packages that fix these vulnerabilities. Users should apply the update as per the advisory RHSA-2025:19433 after confirming all prior relevant errata have been installed. No additional mitigation steps are indicated beyond applying the official update.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2025:19433
- Cve Count
- 3
- Additional Cves
- ["CVE-2025-62230","CVE-2025-62231"]
- Cvss Version
- null
Threat ID: 6a3da1df4853345fc182b3fd
Added to database: 06/25/2026, 21:47:11 UTC
Last enriched: 06/25/2026, 22:26:36 UTC
Last updated: 07/02/2026, 20:51:18 UTC
Views: 6
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