Is CVE-2025-26598 actively exploited?

CVE-2025-26598 has no public evidence of in-the-wild exploitation as of 2025-11-03.

What is the CVSS score for CVE-2025-26598?

CVE-2025-26598 has a CVSS score of 7.8 (HIGH severity). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

How do I patch CVE-2025-26598?

Patch guidance is available from tigervnc security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2025-26598.

Fix CVE-2025-26598 - HIGH tigervnc tigervnc

Q: Which products are affected by CVE-2025-26598?

6 products: tigervnc tigervnc, x.org x server, x.org xwayland, redhat enterprise linux, redhat enterprise linux, and 1 more.

Description

An out-of-bounds write flaw was found in X.Org and Xwayland. The function GetBarrierDevice() searches for the pointer device based on its device ID and returns the matching value, or supposedly NULL, if no match was found. However, the code will return the last element of the list if no matching device ID is found, which can lead to out-of-bounds memory access.

CVSS Metrics

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector: local
Complexity: low
Privileges: low
User Action: none
Scope: unchanged
Confidentiality: high
Integrity: high
Availability: high
Weaknesses: CWE-787 · Out-of-bounds Write CWE-787 · Out-of-bounds Write

Metadata

Primary Vendor: TIGERVNC
Published: 2/25/2025
Last Modified: 11/3/2025
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

tigervnc : tigervncx.org : x_serverx.org : xwaylandredhat : enterprise_linuxredhat : enterprise_linuxredhat : enterprise_linux

Remediation Guidance

Executive Summary

View on NIST NVD