Xorg-x11-server-xwayland: xorg-x11-server: tigervnc: data leak in xfixes extension's xfixessetclientdisconnectmode

6.1 CVSS

Vulnerability Description

A flaw was found in the XFIXES extension. The XFixesSetClientDisconnectMode handler does not validate the request length, allowing a client to read unintended memory from previous requests.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

Red Hat would like to thank Julian Suleder and Nils Emmerich for reporting this issue.

References

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CVE-2025-62230

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CVE-2025-62229

Xorg: xmayland: use-after-free in xpresentnotify structure creation

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CVE-2025-49180

Xorg-x11-server-xwayland: xorg-x11-server: tigervnc: integer overflow in x resize, rotate and reflect (randr) extension

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CVE-2025-49179

Xorg-x11-server-xwayland: xorg-x11-server: tigervnc: integer overflow in x record extension

High 7.3

Affected Vendor

X.Org

View all reports →

Affected Software

xwayland, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat Enterprise Linux 9.4 Extended Update Support, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8

Vulnerable Versions:

0, 0:24.1.5-4.el10_0, 0:1.20.11-31.el9_6, 0:23.2.7-4.el9_6, 0:22.1.9-6.el9_4