Red Hat Security Advisory: xorg-x11-server security update
X.Org is an open-source implementation of the X Window System. It provides the basic low-level functionality that full-fledged graphical user interfaces are designed upon. 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 the xorg-x11-server package used in Red Hat Enterprise Linux 9. The issues include two use-after-free vulnerabilities: one in the XPresentNotify structure creation within xmayland (CVE-2025-62229) and another in the Xkb client resource removal in xwayland (CVE-2025-62230). Additionally, a value overflow vulnerability exists in the XkbSetCompatMap function in xmayland (CVE-2025-62231). These vulnerabilities could potentially lead to memory corruption or instability. Red Hat has released security updates to address these issues in version 1.20.11-32.el9_7 of the xorg-x11-server package and related components for Red Hat Enterprise Linux 9 and its extended update support variants.
Potential Impact
The vulnerabilities involve use-after-free and value overflow conditions in core components of the X.Org server implementation, which could lead to memory corruption or unexpected behavior in graphical environments. The Red Hat advisory rates the overall security impact as moderate. No known exploits in the wild have been reported at this time.
Mitigation Recommendations
Red Hat has released updated packages for xorg-x11-server that address these vulnerabilities. Users of Red Hat Enterprise Linux 9 and its variants should apply the security update described in advisory RHSA-2025:20961 as soon as possible. Detailed update instructions are available at https://access.redhat.com/articles/11258. Since this is an official Red Hat security advisory with patches available, applying the vendor-provided updates is the recommended remediation.
Red Hat Security Advisory: xorg-x11-server security update
Description
X.Org is an open-source implementation of the X Window System. It provides the basic low-level functionality that full-fledged graphical user interfaces are designed upon. 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
Run 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
This advisory covers three security vulnerabilities in the xorg-x11-server package used in Red Hat Enterprise Linux 9. The issues include two use-after-free vulnerabilities: one in the XPresentNotify structure creation within xmayland (CVE-2025-62229) and another in the Xkb client resource removal in xwayland (CVE-2025-62230). Additionally, a value overflow vulnerability exists in the XkbSetCompatMap function in xmayland (CVE-2025-62231). These vulnerabilities could potentially lead to memory corruption or instability. Red Hat has released security updates to address these issues in version 1.20.11-32.el9_7 of the xorg-x11-server package and related components for Red Hat Enterprise Linux 9 and its extended update support variants.
Potential Impact
The vulnerabilities involve use-after-free and value overflow conditions in core components of the X.Org server implementation, which could lead to memory corruption or unexpected behavior in graphical environments. The Red Hat advisory rates the overall security impact as moderate. No known exploits in the wild have been reported at this time.
Mitigation Recommendations
Red Hat has released updated packages for xorg-x11-server that address these vulnerabilities. Users of Red Hat Enterprise Linux 9 and its variants should apply the security update described in advisory RHSA-2025:20961 as soon as possible. Detailed update instructions are available at https://access.redhat.com/articles/11258. Since this is an official Red Hat security advisory with patches available, applying the vendor-provided updates is the recommended remediation.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2025:20961
- Cve Count
- 3
- Additional Cves
- ["CVE-2025-62230","CVE-2025-62231"]
- Cvss Version
- null
Threat ID: 6a3da1dd4853345fc182a234
Added to database: 06/25/2026, 21:47:09 UTC
Last enriched: 06/25/2026, 22:23:28 UTC
Last updated: 07/02/2026, 01:51:09 UTC
Views: 4
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.