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 (CVE-2026-34003) exists in the X.Org X server component of Red Hat Enterprise Linux 10, specifically in the XKB key types request validation logic. It allows a local attacker to trigger an out-of-bounds memory access by sending a crafted request to the X server. This can lead to sensitive information disclosure or cause the server to crash, resulting in denial of service. The issue is tracked under CWE-125 (Out-of-bounds Read). Red Hat has issued an important security advisory with updated packages that fix this vulnerability in versions 10.2 and later.
Potential Impact
Successful exploitation can lead to disclosure of sensitive information and denial of service via server crashes. The CVSS v3.1 base score is 7.8 (High), reflecting high confidentiality, integrity, and availability impacts. No known exploits in the wild have been reported at this time.
Mitigation Recommendations
Red Hat has released official security updates that fix this vulnerability in the xorg-x11-server-Xwayland package for Red Hat Enterprise Linux 10. Users should apply the updates to version 10.2 or later as detailed in the Red Hat advisory (https://access.redhat.com/articles/11258). No additional mitigations are required beyond applying the official patches.
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
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-34003) exists in the X.Org X server component of Red Hat Enterprise Linux 10, specifically in the XKB key types request validation logic. It allows a local attacker to trigger an out-of-bounds memory access by sending a crafted request to the X server. This can lead to sensitive information disclosure or cause the server to crash, resulting in denial of service. The issue is tracked under CWE-125 (Out-of-bounds Read). Red Hat has issued an important security advisory with updated packages that fix this vulnerability in versions 10.2 and later.
Potential Impact
Successful exploitation can lead to disclosure of sensitive information and denial of service via server crashes. The CVSS v3.1 base score is 7.8 (High), reflecting high confidentiality, integrity, and availability impacts. No known exploits in the wild have been reported at this time.
Mitigation Recommendations
Red Hat has released official security updates that fix this vulnerability in the xorg-x11-server-Xwayland package for Red Hat Enterprise Linux 10. Users should apply the updates to version 10.2 or later as detailed in the Red Hat advisory (https://access.redhat.com/articles/11258). No additional mitigations are required beyond applying the official patches.
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: 04/23/2026, 17:36:03 UTC
Last enriched: 07/15/2026, 09:01:36 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 155
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