Use-After-Free Vulnerability in X.Org and Xwayland Software
CVE-2025-26601

7.8HIGH

Key Information:

Vendor
Red Hat
Status
Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8
Red Hat Enterprise Linux 9
Vendor
CVE Published:
25 February 2025

Summary

A use-after-free flaw exists within the X.Org and Xwayland software. This vulnerability arises during the process of changing alarm settings, where change mask values are incrementally evaluated. If an error occurs during this evaluation, the function exits prematurely, failing to create the necessary new sync object. As a consequence, a scenario may occur where the alarm fires improperly, leading to potential memory access violations and unexpected behavior, which can severely compromise system stability and security.

References

https://access.redhat.com/security/cve/CVE-2025-26601
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2345251
issue-trackingx_refsource_REDHAT

CVSS V3.1

Score:
7.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.