CVE-2026-34003: Out-of-bounds Read in Red Hat Red Hat Enterprise Linux 10
A flaw was found in the X.Org X server's XKB key types request validation. A local attacker could send a specially crafted request to the X server, leading to an out-of-bounds memory access vulnerability. This could result in the disclosure of sensitive information or cause the server to crash, leading to a Denial of Service (DoS). In certain configurations, higher impact outcomes may be possible.
AI Analysis
Technical Summary
This vulnerability involves an out-of-bounds read in the X.Org X server's XKB key types request validation component. It allows a local attacker with low privileges to craft a request that triggers out-of-bounds memory access, which can lead to sensitive information disclosure or a denial of service condition by crashing the X server. The issue affects Red Hat Enterprise Linux 10 and is part of a set of vulnerabilities addressed in the xorg-x11-server-Xwayland package. Red Hat has issued security advisories RHSA-2026:11352 and RHSA-2026:10739 detailing the fixes and providing updated packages.
Potential Impact
The vulnerability can lead to disclosure of sensitive information and denial of service by crashing the X.Org X server. The CVSS v3.1 base score is 7.8, indicating high severity with impacts on confidentiality, integrity, and availability. There are no known exploits in the wild at this time. The flaw requires local access with low privileges and does not require user interaction.
Mitigation Recommendations
Red Hat has released official security updates for the xorg-x11-server-Xwayland package in Red Hat Enterprise Linux 10 that address CVE-2026-34003. Applying these updates will remediate the vulnerability. Users should follow Red Hat's guidance in the advisories RHSA-2026:11352 and RHSA-2026:10739 and apply the provided patches promptly. No additional mitigations are specified or required beyond applying the official fixes.
CVE-2026-34003: Out-of-bounds Read in Red Hat Red Hat Enterprise Linux 10
Description
A flaw was found in the X.Org X server's XKB key types request validation. A local attacker could send a specially crafted request to the X server, leading to an out-of-bounds memory access vulnerability. This could result in the disclosure of sensitive information or cause the server to crash, leading to a Denial of Service (DoS). In certain configurations, higher impact outcomes may be possible.
CVSS v3.1
Score 7.8high
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves an out-of-bounds read in the X.Org X server's XKB key types request validation component. It allows a local attacker with low privileges to craft a request that triggers out-of-bounds memory access, which can lead to sensitive information disclosure or a denial of service condition by crashing the X server. The issue affects Red Hat Enterprise Linux 10 and is part of a set of vulnerabilities addressed in the xorg-x11-server-Xwayland package. Red Hat has issued security advisories RHSA-2026:11352 and RHSA-2026:10739 detailing the fixes and providing updated packages.
Potential Impact
The vulnerability can lead to disclosure of sensitive information and denial of service by crashing the X.Org X server. The CVSS v3.1 base score is 7.8, indicating high severity with impacts on confidentiality, integrity, and availability. There are no known exploits in the wild at this time. The flaw requires local access with low privileges and does not require user interaction.
Mitigation Recommendations
Red Hat has released official security updates for the xorg-x11-server-Xwayland package in Red Hat Enterprise Linux 10 that address CVE-2026-34003. Applying these updates will remediate the vulnerability. Users should follow Red Hat's guidance in the advisories RHSA-2026:11352 and RHSA-2026:10739 and apply the provided patches promptly. No additional mitigations are specified or required beyond applying the official fixes.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- redhat
- Date Reserved
- 2026-03-25T04:53:13.615Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://access.redhat.com/security/cve/CVE-2026-34003","vendor":"Red Hat"}]
Threat ID: 69ea588387115cfb683b9244
Added to database: 4/23/2026, 5:36:03 PM
Last enriched: 6/4/2026, 7:54:12 PM
Last updated: 6/8/2026, 5:05:39 AM
Views: 91
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