Use-After-Free Flaw in X.Org X Server's X Keyboard Extension Impacting Red Hat
CVE-2025-62230

7.3HIGH

Key Information:

Vendor

Red Hat
Status
Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8
Vendor
CVE Published:
30 October 2025

What is CVE-2025-62230?

A flaw exists in the X.Org X server’s X Keyboard (Xkb) extension that occurs during the cleanup of client resources. Specifically, the software improperly frees certain data structures without detaching the associated resources, which can result in a use-after-free condition. This vulnerability may lead to memory corruption or application crashes when affected clients disconnect, creating potential instability and security issues within the system.

References

https://access.redhat.com/security/cve/CVE-2025-62230
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2402653
issue-trackingx_refsource_REDHAT

CVSS V3.1

Score:
7.3
Severity:
HIGH
Confidentiality:
High
Integrity:
Low
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Red Hat would like to thank Jan-Niklas Sohn (Trend Micro Zero Day Initiative) for reporting this issue.
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CVE-2025-62230 : Use-After-Free Flaw in X.Org X Server's X Keyboard Extension Impacting Red Hat