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 9. These include a denial of service via integer underflow (CVE-2026-33999), a use-after-free vulnerability causing server crashes and potential memory corruption (CVE-2026-34001), and information exposure combined with denial of service via out-of-bounds memory access (CVE-2026-34003). Red Hat has issued an important 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 in Red Hat Enterprise Linux 9, contains three vulnerabilities: an integer underflow in XKB compatibility map handling leading to denial of service (CVE-2026-33999), a use-after-free vulnerability that can cause server crashes and memory corruption (CVE-2026-34001), and an out-of-bounds memory access vulnerability resulting in information exposure and denial of service (CVE-2026-34003). These vulnerabilities are rated as important by Red Hat Product Security. The advisory RHSA-2026:19344 provides updated packages to remediate these issues.
Potential Impact
Successful exploitation of these vulnerabilities could lead to denial of service conditions, server crashes, potential memory corruption, and information exposure on affected Red Hat Enterprise Linux 9 systems running xorg-x11-server-Xwayland. There are no known exploits in the wild at this time.
Mitigation Recommendations
Red Hat has released updated xorg-x11-server-Xwayland packages for Red Hat Enterprise Linux 9 to address these vulnerabilities. Users should apply the updates as described in Red Hat advisory RHSA-2026:19344 and the referenced update article (https://access.redhat.com/articles/11258). Patch status is confirmed as available and official fixes have been issued. 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 9. These include a denial of service via integer underflow (CVE-2026-33999), a use-after-free vulnerability causing server crashes and potential memory corruption (CVE-2026-34001), and information exposure combined with denial of service via out-of-bounds memory access (CVE-2026-34003). Red Hat has issued an important security advisory with updates to address these issues.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The xorg-x11-server-Xwayland package, which enables running X clients under Wayland in Red Hat Enterprise Linux 9, contains three vulnerabilities: an integer underflow in XKB compatibility map handling leading to denial of service (CVE-2026-33999), a use-after-free vulnerability that can cause server crashes and memory corruption (CVE-2026-34001), and an out-of-bounds memory access vulnerability resulting in information exposure and denial of service (CVE-2026-34003). These vulnerabilities are rated as important by Red Hat Product Security. The advisory RHSA-2026:19344 provides updated packages to remediate these issues.
Potential Impact
Successful exploitation of these vulnerabilities could lead to denial of service conditions, server crashes, potential memory corruption, and information exposure on affected Red Hat Enterprise Linux 9 systems running xorg-x11-server-Xwayland. There are no known exploits in the wild at this time.
Mitigation Recommendations
Red Hat has released updated xorg-x11-server-Xwayland packages for Red Hat Enterprise Linux 9 to address these vulnerabilities. Users should apply the updates as described in Red Hat advisory RHSA-2026:19344 and the referenced update article (https://access.redhat.com/articles/11258). Patch status is confirmed as available and official fixes have been issued. 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-2026:19344
- Cve Count
- 3
- Additional Cves
- ["CVE-2026-34001","CVE-2026-34003"]
- Cvss Version
- null
Threat ID: 6a160980e29bf47b5064d58c
Added to database: 5/26/2026, 8:58:40 PM
Last enriched: 5/26/2026, 9:51:08 PM
Last updated: 5/27/2026, 4:52:54 AM
Views: 2
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