CVE-2025-26596
X.Org Xwayland Heap Overflow Vulnerability
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.
INFO
Published Date :
Feb. 25, 2025, 4:15 p.m.
Last Modified :
April 10, 2025, 8:19 p.m.
Source :
[email protected]
Remotely Exploitable :
No
Impact Score :
5.9
Exploitability Score :
1.8
Affected Products
The following products are affected by CVE-2025-26596
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2025-26596.
| URL | 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 |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-26596 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2025-26596 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Modified Analysis by [email protected]
Apr. 10, 2025
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Added Reference Type Red Hat, Inc.: https://access.redhat.com/errata/RHSA-2025:2500 Types: Third Party Advisory Added Reference Type Red Hat, Inc.: https://access.redhat.com/errata/RHSA-2025:2502 Types: Third Party Advisory Added Reference Type Red Hat, Inc.: https://access.redhat.com/errata/RHSA-2025:2861 Types: Third Party Advisory Added Reference Type Red Hat, Inc.: https://access.redhat.com/errata/RHSA-2025:2862 Types: Third Party Advisory Added Reference Type Red Hat, Inc.: https://access.redhat.com/errata/RHSA-2025:2865 Types: Third Party Advisory Added Reference Type Red Hat, Inc.: https://access.redhat.com/errata/RHSA-2025:2866 Types: Third Party Advisory Added Reference Type Red Hat, Inc.: https://access.redhat.com/errata/RHSA-2025:2873 Types: Third Party Advisory Added Reference Type Red Hat, Inc.: https://access.redhat.com/errata/RHSA-2025:2874 Types: Third Party Advisory Added Reference Type Red Hat, Inc.: https://access.redhat.com/errata/RHSA-2025:2875 Types: Third Party Advisory Added Reference Type Red Hat, Inc.: https://access.redhat.com/errata/RHSA-2025:2879 Types: Third Party Advisory Added Reference Type Red Hat, Inc.: https://access.redhat.com/errata/RHSA-2025:2880 Types: Third Party Advisory -
CVE Modified by [email protected]
Mar. 21, 2025
Action Type Old Value New Value Added CWE CWE-787 Removed CWE CWE-122 -
CVE Modified by [email protected]
Mar. 17, 2025
Action Type Old Value New Value Added Reference https://access.redhat.com/errata/RHSA-2025:2861 Added Reference https://access.redhat.com/errata/RHSA-2025:2866 Added Reference https://access.redhat.com/errata/RHSA-2025:2873 Added Reference https://access.redhat.com/errata/RHSA-2025:2879 Added Reference https://access.redhat.com/errata/RHSA-2025:2880 -
CVE Modified by [email protected]
Mar. 17, 2025
Action Type Old Value New Value Added Reference https://access.redhat.com/errata/RHSA-2025:2865 Added Reference https://access.redhat.com/errata/RHSA-2025:2874 Added Reference https://access.redhat.com/errata/RHSA-2025:2875 -
CVE Modified by [email protected]
Mar. 17, 2025
Action Type Old Value New Value Added Reference https://access.redhat.com/errata/RHSA-2025:2862 -
CVE Modified by [email protected]
Mar. 10, 2025
Action Type Old Value New Value Added Reference https://access.redhat.com/errata/RHSA-2025:2500 Added Reference https://access.redhat.com/errata/RHSA-2025:2502 -
Initial Analysis by [email protected]
Mar. 04, 2025
Action Type Old Value New Value Added CWE CWE-787 Added CPE Configuration OR *cpe:2.3:a:tigervnc:tigervnc:-:*:*:*:*:*:*:* Added CPE Configuration OR *cpe:2.3:a:x.org:x_server:-:*:*:*:*:*:*:* *cpe:2.3:a:x.org:xwayland:-:*:*:*:*:*:*:* Added CPE Configuration OR *cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:* Added Reference Type Red Hat, Inc.: https://access.redhat.com/security/cve/CVE-2025-26596 Types: Third Party Advisory Added Reference Type Red Hat, Inc.: https://bugzilla.redhat.com/show_bug.cgi?id=2345256 Types: Issue Tracking -
New CVE Received by [email protected]
Feb. 25, 2025
Action Type Old Value New Value Added 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. Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Added CWE CWE-122 Added Reference https://access.redhat.com/security/cve/CVE-2025-26596 Added Reference https://bugzilla.redhat.com/show_bug.cgi?id=2345256
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-26596 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2025-26596
weaknesses.