CVE-2025-26596

7.8 HIGH
Published: February 25, 2025 Modified: November 03, 2025

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.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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

17 reference(s) from NVD

Quick Stats

CVSS v3 Score
7.8 / 10.0
EPSS (Exploit Probability)
0.1%
16th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

Affected Vendors

tigervnc redhat x.org