Red Hat Security Advisory: xorg-x11-server-Xwayland security update
Xwayland is an X server for running X clients under Wayland. Security Fix(es): * xorg: xwayland: X.Org X server: Denial of Service via integer underflow in XKB compatibility map handling (CVE-2026-33999) * xorg: xwayland: X.Org X server: Use-after-free vulnerability leads to server crash and potential memory corruption (CVE-2026-34001) * xorg: xwayland: X.Org X server: Information exposure and denial of service via out-of-bounds memory access (CVE-2026-34003) 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 xorg-x11-server-Xwayland component in Red Hat Enterprise Linux 9 contains three security vulnerabilities: CVE-2026-33999 is an integer underflow in XKB compatibility map handling that can cause denial of service; CVE-2026-34001 is a use-after-free vulnerability that may lead to server crashes and memory corruption; CVE-2026-34003 involves out-of-bounds memory access resulting in information exposure and denial of service. These vulnerabilities have been fixed in updated packages provided by Red Hat in advisory RHSA-2026:11369.
Potential Impact
Successful exploitation of these vulnerabilities can cause denial of service conditions, server crashes, potential memory corruption, and information exposure on affected systems running xorg-x11-server-Xwayland. This could disrupt normal operation of graphical sessions under Wayland and potentially expose sensitive information.
Mitigation Recommendations
Red Hat has released updated xorg-x11-server-Xwayland packages that address these vulnerabilities. Users and administrators should apply the security update as described in Red Hat advisory RHSA-2026:11369 and the referenced article https://access.redhat.com/articles/11258. The update is available for Red Hat Enterprise Linux 9 and related variants. No additional mitigations are required beyond applying the official patch.
Red Hat Security Advisory: xorg-x11-server-Xwayland security update
Description
Xwayland is an X server for running X clients under Wayland. Security Fix(es): * xorg: xwayland: X.Org X server: Denial of Service via integer underflow in XKB compatibility map handling (CVE-2026-33999) * xorg: xwayland: X.Org X server: Use-after-free vulnerability leads to server crash and potential memory corruption (CVE-2026-34001) * xorg: xwayland: X.Org X server: Information exposure and denial of service via out-of-bounds memory access (CVE-2026-34003) 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
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The xorg-x11-server-Xwayland component in Red Hat Enterprise Linux 9 contains three security vulnerabilities: CVE-2026-33999 is an integer underflow in XKB compatibility map handling that can cause denial of service; CVE-2026-34001 is a use-after-free vulnerability that may lead to server crashes and memory corruption; CVE-2026-34003 involves out-of-bounds memory access resulting in information exposure and denial of service. These vulnerabilities have been fixed in updated packages provided by Red Hat in advisory RHSA-2026:11369.
Potential Impact
Successful exploitation of these vulnerabilities can cause denial of service conditions, server crashes, potential memory corruption, and information exposure on affected systems running xorg-x11-server-Xwayland. This could disrupt normal operation of graphical sessions under Wayland and potentially expose sensitive information.
Mitigation Recommendations
Red Hat has released updated xorg-x11-server-Xwayland packages that address these vulnerabilities. Users and administrators should apply the security update as described in Red Hat advisory RHSA-2026:11369 and the referenced article https://access.redhat.com/articles/11258. The update is available for Red Hat Enterprise Linux 9 and related variants. No additional mitigations are required beyond applying the official patch.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:11369
- Cve Count
- 3
- Additional Cves
- ["CVE-2026-34001","CVE-2026-34003"]
- Cvss Version
- null
Threat ID: 6a160980e29bf47b5064dbdc
Added to database: 05/26/2026, 20:58:40 UTC
Last enriched: 06/26/2026, 01:15:45 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 76
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