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Vulnerability Details CVE-2026-34002

A flaw was found in the X.Org X server. This vulnerability, an out-of-bounds read, affects the XKB (X Keyboard Extension) modifier map handling. An attacker with access to the X11 server can exploit this by sending a malformed request, which causes the server to read beyond its intended memory boundaries. This can lead to the exposure of sensitive information or cause the server to crash, resulting in a denial of service.

Exploit prediction scoring system (EPSS) score

EPSS Score 0.0

EPSS Ranking 8.1%

CVSS Severity

CVSS v3 Score 6.1

References

Products affected by CVE-2026-34002

X.org » X Server » Version: N/A

cpe:2.3:a:x.org:x_server:-
Redhat » Enterprise Linux » Version: 10.0

cpe:2.3:o:redhat:enterprise_linux:10.0
Redhat » Enterprise Linux » Version: 6.0

cpe:2.3:o:redhat:enterprise_linux:6.0
Redhat » Enterprise Linux » Version: 7.0

cpe:2.3:o:redhat:enterprise_linux:7.0
Redhat » Enterprise Linux » Version: 8.0

cpe:2.3:o:redhat:enterprise_linux:8.0
Redhat » Enterprise Linux » Version: 9.0

cpe:2.3:o:redhat:enterprise_linux:9.0

Vulnerabilities

Vulnerable Software

Vulnerability Details CVE-2026-34002

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