Red Hat Security Advisory: xorg-x11-server-Xwayland security, bug fix, and enhancement update
Multiple security vulnerabilities have been identified in xorg-x11-server-Xwayland, an X server for running X clients under Wayland, affecting Red Hat Enterprise Linux 9. These include stack buffer overflows, use-after-free conditions, out-of-bounds read/write, and information disclosure issues. The vulnerabilities are addressed in an update provided by Red Hat. The advisory rates the security impact as Important (high severity).
AI Analysis
Technical Summary
This advisory covers nine security vulnerabilities in xorg-x11-server-Xwayland, including stack buffer overflows due to font alias resolution and XKB key types, use-after-free bugs in multiple functions (miSyncDestroyFence, FreeCounter, SyncChangeCounter, CreateSaverWindow), out-of-bounds read/write in GLX ChangeDrawableAttributes, and out-of-bounds heap write in DRI2 buffer handling. These issues could lead to memory corruption and information disclosure. Red Hat has released an update for Red Hat Enterprise Linux 9 to address these vulnerabilities.
Potential Impact
The vulnerabilities include memory corruption issues such as stack buffer overflows and use-after-free bugs, which could potentially be exploited to cause crashes, execute arbitrary code, or disclose sensitive information. The advisory rates the impact as Important, indicating a high security risk if unpatched.
Mitigation Recommendations
Red Hat has released an update for xorg-x11-server-Xwayland in Red Hat Enterprise Linux 9 that addresses these vulnerabilities. Users should apply the update as described in the Red Hat advisory RHSA-2026:26590. Patch status is confirmed as an official fix available from Red Hat. No additional mitigation steps are specified beyond applying the update.
Red Hat Security Advisory: xorg-x11-server-Xwayland security, bug fix, and enhancement update
Description
Multiple security vulnerabilities have been identified in xorg-x11-server-Xwayland, an X server for running X clients under Wayland, affecting Red Hat Enterprise Linux 9. These include stack buffer overflows, use-after-free conditions, out-of-bounds read/write, and information disclosure issues. The vulnerabilities are addressed in an update provided by Red Hat. The advisory rates the security impact as Important (high severity).
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This advisory covers nine security vulnerabilities in xorg-x11-server-Xwayland, including stack buffer overflows due to font alias resolution and XKB key types, use-after-free bugs in multiple functions (miSyncDestroyFence, FreeCounter, SyncChangeCounter, CreateSaverWindow), out-of-bounds read/write in GLX ChangeDrawableAttributes, and out-of-bounds heap write in DRI2 buffer handling. These issues could lead to memory corruption and information disclosure. Red Hat has released an update for Red Hat Enterprise Linux 9 to address these vulnerabilities.
Potential Impact
The vulnerabilities include memory corruption issues such as stack buffer overflows and use-after-free bugs, which could potentially be exploited to cause crashes, execute arbitrary code, or disclose sensitive information. The advisory rates the impact as Important, indicating a high security risk if unpatched.
Mitigation Recommendations
Red Hat has released an update for xorg-x11-server-Xwayland in Red Hat Enterprise Linux 9 that addresses these vulnerabilities. Users should apply the update as described in the Red Hat advisory RHSA-2026:26590. Patch status is confirmed as an official fix available from Red Hat. No additional mitigation steps are specified beyond applying the 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-2026:26590
- Cve Count
- 9
- Additional Cves
- ["CVE-2026-50257","CVE-2026-50258","CVE-2026-50259","CVE-2026-50260","CVE-2026-50261","CVE-2026-50262","CVE-2026-50263","CVE-2026-50264"]
- Cvss Version
- null
Threat ID: 6a32cef49f87a2db092a2a21
Added to database: 6/17/2026, 4:44:36 PM
Last enriched: 6/17/2026, 5:07:16 PM
Last updated: 6/17/2026, 6:23:32 PM
Views: 2
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