Red Hat Security Advisory: xorg-x11-server-Xwayland security update
Multiple security vulnerabilities have been identified in the xorg-x11-server-Xwayland component of Red Hat Enterprise Linux 10.0 Extended Update Support. These include denial of service via integer underflow, information disclosure and denial of service via out-of-bounds reads, use-after-free leading to server crash and potential memory corruption, and information exposure through out-of-bounds memory access. Red Hat has issued a security advisory with updates to address these issues.
AI Analysis
Technical Summary
The xorg-x11-server-Xwayland package, which enables running X clients under Wayland, contains several vulnerabilities: CVE-2026-33999 is a denial of service caused by an integer underflow in XKB compatibility map handling; CVE-2026-34000 and CVE-2026-34002 involve information disclosure and denial of service via out-of-bounds reads in XKB geometry and modifier map handling respectively; CVE-2026-34001 is a use-after-free vulnerability that can cause server crashes and potential memory corruption; CVE-2026-34003 involves information exposure and denial of service via out-of-bounds memory access. These vulnerabilities affect Red Hat Enterprise Linux 10.0 Extended Update Support and related CodeReady Linux Builder variants across multiple architectures including x86_64, s390x, ppc64le, and aarch64. Red Hat has released updated packages to fix these issues as detailed in advisory RHSA-2026:20563.
Potential Impact
Successful exploitation of these vulnerabilities could lead to denial of service conditions causing the X server to crash or become unresponsive, information disclosure of sensitive data through out-of-bounds memory reads, and potential memory corruption due to use-after-free bugs. These impacts affect the stability and confidentiality of the X server environment running under Wayland on affected Red Hat Enterprise Linux 10.0 systems.
Mitigation Recommendations
Red Hat has released security updates for xorg-x11-server-Xwayland in Red Hat Enterprise Linux 10.0 Extended Update Support and related CodeReady Linux Builder products. Users should apply these official patches as described in Red Hat advisory RHSA-2026:20563 available at https://access.redhat.com/errata/RHSA-2026:20563. Applying these updates will remediate the identified vulnerabilities. No additional mitigation steps are indicated by the vendor.
Red Hat Security Advisory: xorg-x11-server-Xwayland security update
Description
Multiple security vulnerabilities have been identified in the xorg-x11-server-Xwayland component of Red Hat Enterprise Linux 10.0 Extended Update Support. These include denial of service via integer underflow, information disclosure and denial of service via out-of-bounds reads, use-after-free leading to server crash and potential memory corruption, and information exposure through out-of-bounds memory access. Red Hat has issued a security advisory with updates to address these issues.
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The xorg-x11-server-Xwayland package, which enables running X clients under Wayland, contains several vulnerabilities: CVE-2026-33999 is a denial of service caused by an integer underflow in XKB compatibility map handling; CVE-2026-34000 and CVE-2026-34002 involve information disclosure and denial of service via out-of-bounds reads in XKB geometry and modifier map handling respectively; CVE-2026-34001 is a use-after-free vulnerability that can cause server crashes and potential memory corruption; CVE-2026-34003 involves information exposure and denial of service via out-of-bounds memory access. These vulnerabilities affect Red Hat Enterprise Linux 10.0 Extended Update Support and related CodeReady Linux Builder variants across multiple architectures including x86_64, s390x, ppc64le, and aarch64. Red Hat has released updated packages to fix these issues as detailed in advisory RHSA-2026:20563.
Potential Impact
Successful exploitation of these vulnerabilities could lead to denial of service conditions causing the X server to crash or become unresponsive, information disclosure of sensitive data through out-of-bounds memory reads, and potential memory corruption due to use-after-free bugs. These impacts affect the stability and confidentiality of the X server environment running under Wayland on affected Red Hat Enterprise Linux 10.0 systems.
Mitigation Recommendations
Red Hat has released security updates for xorg-x11-server-Xwayland in Red Hat Enterprise Linux 10.0 Extended Update Support and related CodeReady Linux Builder products. Users should apply these official patches as described in Red Hat advisory RHSA-2026:20563 available at https://access.redhat.com/errata/RHSA-2026:20563. Applying these updates will remediate the identified vulnerabilities. No additional mitigation steps are indicated by the vendor.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:20563
- Cve Count
- 5
- Additional Cves
- ["CVE-2026-34000","CVE-2026-34001","CVE-2026-34002","CVE-2026-34003"]
- Cvss Version
- null
Threat ID: 6a160980e29bf47b5064cbe5
Added to database: 05/26/2026, 20:58:40 UTC
Last enriched: 07/13/2026, 10:49:00 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 59
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