CVE-2025-49178 - CVE House
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Status published Medium CVE-2025-49178

Xorg-x11-server-xwayland: xorg-x11-server: tigervnc: unprocessed client request due to bytes to ignore

Vulnerability Description

A flaw was found in the X server's request handling. Non-zero 'bytes to ignore' in a client's request can cause the server to skip processing another client's request, potentially leading to a denial of service.

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

No credits recorded in the NVD database.

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

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

Timeline

Official Publish: June 17th, 2025
Last Modified: June 30th, 2026
Added to House: July 22nd, 2026

CVSS Vectors

V3: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weaknesses (CWE)

CWE-667

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.