Xorg-x11-server-xwayland: xorg-x11-server: tigervnc: out-of-bounds read in x rendering extension animated cursors

6.1 CVSS

Vulnerability Description

A flaw was found in the X Rendering extension's handling of animated cursors. If a client provides no cursors, the server assumes at least one is present, leading to an out-of-bounds read and potential crash.

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-2025-62229

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

High 7.8

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 6 Extended Lifecycle Support - EXTENSION, Red Hat Enterprise Linux 7.7 Advanced Update Support, Red Hat Enterprise Linux 7 Extended Lifecycle Support, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 8.2 Advanced Update Support, Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On, Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On, Red Hat Enterprise Linux 8.6 Telecommunications Update Service, Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions, Red Hat Enterprise Linux 8.8 Extended Update Support Long-Life Add-On, Red Hat Enterprise Linux 8.8 Telecommunications Update Service, Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions, Red Hat Enterprise Linux 9, Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions, Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions, Red Hat Enterprise Linux 9.4 Extended Update Support, Red Hat Enterprise Linux 6

Vulnerable Versions:

0, 0:24.1.5-4.el10_0, 0:1.1.0-25.el6_10.1, 0:1.8.0-17.el7_7.1, 0:1.20.4-32.el7_9, 0:1.8.0-36.el7_9.2, 0:1.20.11-26.el8_10, 0:21.1.3-18.el8_10, 0:1.15.0-7.el8_10, 0:1.9.0-15.el8_2.14, 0:1.20.6-4.el8_2, 0:1.20.10-2.el8_4, 0:1.11.0-8.el8_4.13, 0:1.12.0-6.el8_6.14, 0:21.1.3-2.el8_6.4, 0:1.20.11-5.el8_6.3, 0:1.20.11-16.el8_8, 0:21.1.3-11.el8_8, 0:1.12.0-15.el8_8.14, 0:1.20.11-31.el9_6, 0:23.2.7-4.el9_6, 0:1.14.1-8.el9_6, 0:21.1.3-3.el9_0, 0:1.20.11-11.el9_0, 0:1.11.0-22.el9_0.15, 0:21.1.3-8.el9_2, 0:1.20.11-18.el9_2, 0:1.12.0-14.el9_2.12, 0:22.1.9-6.el9_4, 0:1.20.11-26.el9_4, 0:1.13.1-8.el9_4.7