Red Hat Security Advisory: xorg-x11-server security update
Multiple vulnerabilities have been identified in the X. Org X server component of Red Hat Enterprise Linux 9. 2, including denial of service, information disclosure, and use-after-free issues related to XKB compatibility map handling, geometry processing, modifier map handling, and memory access. These vulnerabilities affect the xorg-x11-server package and can lead to server crashes, potential memory corruption, and unauthorized information exposure. Red Hat has issued an important security advisory with updates addressing these issues.
AI Analysis
Technical Summary
The Red Hat Enterprise Linux 9.2 xorg-x11-server package contains multiple security vulnerabilities in the X.Org X server and xwayland components. These include an integer underflow causing denial of service (CVE-2026-33999), out-of-bounds reads leading to information disclosure and denial of service (CVE-2026-34000, CVE-2026-34002, CVE-2026-34003), and a use-after-free vulnerability causing server crashes and potential memory corruption (CVE-2026-34001). These issues stem from improper handling of XKB compatibility maps, geometry processing, and modifier maps. Red Hat has released updated packages to fix these vulnerabilities.
Potential Impact
Successful exploitation of these vulnerabilities can result in denial of service conditions causing the X.Org X server to crash, potential memory corruption, and unauthorized disclosure of information. This can disrupt graphical user interface functionality on affected Red Hat Enterprise Linux 9.2 systems. There are no known exploits in the wild at this time.
Mitigation Recommendations
Red Hat has released updated xorg-x11-server packages for Red Hat Enterprise Linux 9.2 that address these vulnerabilities. Users should apply the security update as detailed in Red Hat advisory RHSA-2026:20557 to remediate these issues. For update instructions, refer to https://access.redhat.com/articles/11258. No additional mitigation steps are indicated by the vendor.
Red Hat Security Advisory: xorg-x11-server security update
Description
Multiple vulnerabilities have been identified in the X. Org X server component of Red Hat Enterprise Linux 9. 2, including denial of service, information disclosure, and use-after-free issues related to XKB compatibility map handling, geometry processing, modifier map handling, and memory access. These vulnerabilities affect the xorg-x11-server package and can lead to server crashes, potential memory corruption, and unauthorized information exposure. Red Hat has issued an important security advisory with updates addressing these issues.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Red Hat Enterprise Linux 9.2 xorg-x11-server package contains multiple security vulnerabilities in the X.Org X server and xwayland components. These include an integer underflow causing denial of service (CVE-2026-33999), out-of-bounds reads leading to information disclosure and denial of service (CVE-2026-34000, CVE-2026-34002, CVE-2026-34003), and a use-after-free vulnerability causing server crashes and potential memory corruption (CVE-2026-34001). These issues stem from improper handling of XKB compatibility maps, geometry processing, and modifier maps. Red Hat has released updated packages to fix these vulnerabilities.
Potential Impact
Successful exploitation of these vulnerabilities can result in denial of service conditions causing the X.Org X server to crash, potential memory corruption, and unauthorized disclosure of information. This can disrupt graphical user interface functionality on affected Red Hat Enterprise Linux 9.2 systems. There are no known exploits in the wild at this time.
Mitigation Recommendations
Red Hat has released updated xorg-x11-server packages for Red Hat Enterprise Linux 9.2 that address these vulnerabilities. Users should apply the security update as detailed in Red Hat advisory RHSA-2026:20557 to remediate these issues. For update instructions, refer to https://access.redhat.com/articles/11258. 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-2026:20557
- Cve Count
- 5
- Additional Cves
- ["CVE-2026-34000","CVE-2026-34001","CVE-2026-34002","CVE-2026-34003"]
- Cvss Version
- null
Threat ID: 6a16097be29bf47b50647b7d
Added to database: 5/26/2026, 8:58:35 PM
Last enriched: 5/26/2026, 11:05:44 PM
Last updated: 5/27/2026, 4:58:44 AM
Views: 2
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