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, which enables running X clients under Wayland, contains three security vulnerabilities: CVE-2026-33999 (denial of service via integer underflow in XKB compatibility map handling), CVE-2026-34001 (use-after-free vulnerability leading to server crash and potential memory corruption), and CVE-2026-34003 (information exposure and denial of service via out-of-bounds memory access). These vulnerabilities affect Red Hat Enterprise Linux 10 and related CodeReady Linux Builder variants across multiple architectures. Red Hat has issued an important security advisory (RHSA-2026:19125) with updated packages to remediate these issues.
Potential Impact
Successful exploitation of these vulnerabilities can cause denial of service conditions by crashing the Xwayland server, potential memory corruption due to use-after-free, and information exposure through out-of-bounds memory access. This could disrupt graphical sessions relying on Xwayland and potentially affect system stability and confidentiality of information handled by the X server.
Mitigation Recommendations
Red Hat has released updated xorg-x11-server-Xwayland packages for Red Hat Enterprise Linux 10 and related variants that address these vulnerabilities. Users should apply the security update as described in Red Hat advisory RHSA-2026:19125. For detailed update instructions, refer to https://access.redhat.com/articles/11258. No additional mitigations are indicated beyond applying the official patches.
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, which enables running X clients under Wayland, contains three security vulnerabilities: CVE-2026-33999 (denial of service via integer underflow in XKB compatibility map handling), CVE-2026-34001 (use-after-free vulnerability leading to server crash and potential memory corruption), and CVE-2026-34003 (information exposure and denial of service via out-of-bounds memory access). These vulnerabilities affect Red Hat Enterprise Linux 10 and related CodeReady Linux Builder variants across multiple architectures. Red Hat has issued an important security advisory (RHSA-2026:19125) with updated packages to remediate these issues.
Potential Impact
Successful exploitation of these vulnerabilities can cause denial of service conditions by crashing the Xwayland server, potential memory corruption due to use-after-free, and information exposure through out-of-bounds memory access. This could disrupt graphical sessions relying on Xwayland and potentially affect system stability and confidentiality of information handled by the X server.
Mitigation Recommendations
Red Hat has released updated xorg-x11-server-Xwayland packages for Red Hat Enterprise Linux 10 and related variants that address these vulnerabilities. Users should apply the security update as described in Red Hat advisory RHSA-2026:19125. For detailed update instructions, refer to https://access.redhat.com/articles/11258. No additional mitigations are indicated beyond applying the official patches.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:19125
- Cve Count
- 3
- Additional Cves
- ["CVE-2026-34001","CVE-2026-34003"]
- Cvss Version
- null
Threat ID: 6a160982e29bf47b5064fcc6
Added to database: 05/26/2026, 20:58:42 UTC
Last enriched: 06/26/2026, 00:59:26 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 111
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