U.S. flag   An official website of the United States government
Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock (Dot gov) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

CVE-2025-26596 Detail

Description

A heap overflow flaw was found in X.Org and Xwayland. The computation of the length in XkbSizeKeySyms() differs from what is written in XkbWriteKeySyms(), which may lead to a heap-based buffer overflow.


Metrics

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving NIST webspace. We have provided these links to other web sites because they may have information that would be of interest to you. No inferences should be drawn on account of other sites being referenced, or not, from this page. There may be other web sites that are more appropriate for your purpose. NIST does not necessarily endorse the views expressed, or concur with the facts presented on these sites. Further, NIST does not endorse any commercial products that may be mentioned on these sites. Please address comments about this page to nvd@nist.gov.

Hyperlink Resource
https://access.redhat.com/errata/RHSA-2025:2500 Third Party Advisory 
https://access.redhat.com/errata/RHSA-2025:2502 Third Party Advisory 
https://access.redhat.com/errata/RHSA-2025:2861 Third Party Advisory 
https://access.redhat.com/errata/RHSA-2025:2862 Third Party Advisory 
https://access.redhat.com/errata/RHSA-2025:2865 Third Party Advisory 
https://access.redhat.com/errata/RHSA-2025:2866 Third Party Advisory 
https://access.redhat.com/errata/RHSA-2025:2873 Third Party Advisory 
https://access.redhat.com/errata/RHSA-2025:2874 Third Party Advisory 
https://access.redhat.com/errata/RHSA-2025:2875 Third Party Advisory 
https://access.redhat.com/errata/RHSA-2025:2879 Third Party Advisory 
https://access.redhat.com/errata/RHSA-2025:2880 Third Party Advisory 
https://access.redhat.com/security/cve/CVE-2025-26596 Third Party Advisory 
https://bugzilla.redhat.com/show_bug.cgi?id=2345256 Issue Tracking 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-787 Out-of-bounds Write cwe source acceptance level NIST   Red Hat, Inc.  

Known Affected Software Configurations Switch to CPE 2.2

CPEs loading, please wait.

Denotes Vulnerable Software
Are we missing a CPE here? Please let us know.

Change History

8 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2025-26596
NVD Published Date:
02/25/2025
NVD Last Modified:
04/10/2025
Source:
Red Hat, Inc.