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.

Score
CVSS 3.1 9.1 Critical
Status
Modified - secalert@redhat.com
Published
2026-05-05
Last modified
2026-10-26
Weaknesses
CWE-805

Affected products

References

 
 
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