Red Hat Security Advisory: xorg-x11-server-Xwayland security update
Two security vulnerabilities have been identified in the xorg-x11-server-Xwayland component used in Red Hat Enterprise Linux 10. These include a heap buffer overflow in the glamor Font Atlas (CVE-2026-55999) and a use-after-free in GLX contextTags in CommonMakeCurrent() (CVE-2026-56000). Red Hat has issued an important security advisory with updates addressing these issues. The vulnerabilities affect multiple architectures and variants of Red Hat Enterprise Linux 10 and related CodeReady Linux Builder products. A security update is available to remediate these flaws.
AI Analysis
Technical Summary
The xorg-x11-server-Xwayland package in Red Hat Enterprise Linux 10 contains two security flaws: a heap buffer overflow in the glamor Font Atlas component (CVE-2026-55999) and a use-after-free vulnerability in GLX contextTags within the CommonMakeCurrent() function (CVE-2026-56000). Both vulnerabilities could potentially lead to memory corruption. Red Hat Product Security has released an update (RHSA-2026:38489) that addresses these issues across multiple supported architectures and product variants. The advisory rates the impact as Important and provides updated packages for Red Hat Enterprise Linux 10 and its Extended Update Support versions.
Potential Impact
These vulnerabilities could allow an attacker to cause memory corruption, potentially leading to application crashes or other unintended behavior. The heap buffer overflow and use-after-free issues may be exploitable to compromise the affected system's stability or security. However, no known exploits in the wild have been reported at this time.
Mitigation Recommendations
Red Hat has released official security updates addressing these vulnerabilities in xorg-x11-server-Xwayland for Red Hat Enterprise Linux 10 and related products. Users should apply the updates as described in Red Hat advisory RHSA-2026:38489 and the associated article https://access.redhat.com/articles/11258. Since a vendor-provided fix is available, applying the update is the recommended remediation. No additional mitigation steps are indicated by the vendor.
Red Hat Security Advisory: xorg-x11-server-Xwayland security update
Description
Two security vulnerabilities have been identified in the xorg-x11-server-Xwayland component used in Red Hat Enterprise Linux 10. These include a heap buffer overflow in the glamor Font Atlas (CVE-2026-55999) and a use-after-free in GLX contextTags in CommonMakeCurrent() (CVE-2026-56000). Red Hat has issued an important security advisory with updates addressing these issues. The vulnerabilities affect multiple architectures and variants of Red Hat Enterprise Linux 10 and related CodeReady Linux Builder products. A security update is available to remediate these flaws.
Affected software
pkg:rpm/redhat/xorg-x11-server-XwaylandRun 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
The xorg-x11-server-Xwayland package in Red Hat Enterprise Linux 10 contains two security flaws: a heap buffer overflow in the glamor Font Atlas component (CVE-2026-55999) and a use-after-free vulnerability in GLX contextTags within the CommonMakeCurrent() function (CVE-2026-56000). Both vulnerabilities could potentially lead to memory corruption. Red Hat Product Security has released an update (RHSA-2026:38489) that addresses these issues across multiple supported architectures and product variants. The advisory rates the impact as Important and provides updated packages for Red Hat Enterprise Linux 10 and its Extended Update Support versions.
Potential Impact
These vulnerabilities could allow an attacker to cause memory corruption, potentially leading to application crashes or other unintended behavior. The heap buffer overflow and use-after-free issues may be exploitable to compromise the affected system's stability or security. However, no known exploits in the wild have been reported at this time.
Mitigation Recommendations
Red Hat has released official security updates addressing these vulnerabilities in xorg-x11-server-Xwayland for Red Hat Enterprise Linux 10 and related products. Users should apply the updates as described in Red Hat advisory RHSA-2026:38489 and the associated article https://access.redhat.com/articles/11258. Since a vendor-provided fix is available, applying the update is the recommended remediation. 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-2026:38489
- Cve Count
- 2
- Additional Cves
- ["CVE-2026-56000"]
- Cvss Version
- null
Threat ID: 6a54ade268715ace438f5e6d
Added to database: 07/13/2026, 09:20:34 UTC
Last enriched: 07/13/2026, 09:45:26 UTC
Last updated: 07/14/2026, 02:47:18 UTC
Views: 5
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