7.8
HIGH
CVE-2025-26597
X.Org/Xwayland Buffer Overflow Vulnerability
Description

A buffer overflow flaw was found in X.Org and Xwayland. If XkbChangeTypesOfKey() is called with a 0 group, it will resize the key symbols table to 0 but leave the key actions unchanged. If the same function is later called with a non-zero value of groups, this will cause a buffer overflow because the key actions are of the wrong size.

INFO

Published Date :

Feb. 25, 2025, 4:15 p.m.

Last Modified :

March 10, 2025, 1:15 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-2025-26597 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.

ID Vendor Product Action
1 X.org x_server
2 X.org xwayland
1 Redhat enterprise_linux
1 Tigervnc tigervnc
: Total Affected Vendor : 3 | Products : 4
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-2025-26597.

URL Resource
https://access.redhat.com/errata/RHSA-2025:2500
https://access.redhat.com/errata/RHSA-2025:2502
https://access.redhat.com/security/cve/CVE-2025-26597 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2345255 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-2025-26597 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2025-26597 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.

  • 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-119
    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-2025-26597 Types: Third Party Advisory
    Added Reference Type Red Hat, Inc.: https://bugzilla.redhat.com/show_bug.cgi?id=2345255 Types: Issue Tracking
  • New CVE Received by [email protected]

    Feb. 25, 2025

    Action Type Old Value New Value
    Added Description A buffer overflow flaw was found in X.Org and Xwayland. If XkbChangeTypesOfKey() is called with a 0 group, it will resize the key symbols table to 0 but leave the key actions unchanged. If the same function is later called with a non-zero value of groups, this will cause a buffer overflow because the key actions are of the wrong size.
    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-2025-26597
    Added Reference https://bugzilla.redhat.com/show_bug.cgi?id=2345255
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2025-26597 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-2025-26597 weaknesses.

CAPEC-8: Buffer Overflow in an API Call Buffer Overflow in an API Call CAPEC-9: Buffer Overflow in Local Command-Line Utilities Buffer Overflow in Local Command-Line Utilities CAPEC-10: Buffer Overflow via Environment Variables Buffer Overflow via Environment Variables CAPEC-14: Client-side Injection-induced Buffer Overflow Client-side Injection-induced Buffer Overflow CAPEC-24: Filter Failure through Buffer Overflow Filter Failure through Buffer Overflow CAPEC-42: MIME Conversion MIME Conversion CAPEC-44: Overflow Binary Resource File Overflow Binary Resource File CAPEC-45: Buffer Overflow via Symbolic Links Buffer Overflow via Symbolic Links CAPEC-46: Overflow Variables and Tags Overflow Variables and Tags CAPEC-47: Buffer Overflow via Parameter Expansion Buffer Overflow via Parameter Expansion CAPEC-100: Overflow Buffers Overflow Buffers CAPEC-123: Buffer Manipulation Buffer Manipulation CAPEC-92: Forced Integer Overflow Forced Integer Overflow
CVSS31 - Vulnerability Scoring System
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