• Tenable
  • CVEs
  • Settings
    Links
    Tenable Cloud Tenable Community & Support Tenable University
    Severity
    Theme
  • Tenable
  • Plugins
  • Overview
  • Plugins Pipeline
  • Newest
  • Updated
  • Search
  • Nessus Families
  • WAS Families
  • NNM Families
  • LCE Families
  • Tenable OT Security Families
  • About Plugin Families
  • Release Notes
  • Audits
  • Overview
  • Newest
  • Updated
  • Search Audit Files
  • Search Items
  • References
  • Authorities
  • Documentation
  • Download All Audit Files
  • Indicators
  • Overview
  • Search
  • Indicators of Attack
  • Indicators of Exposure
  • CVEs
  • Overview
  • Newest
  • Updated
  • Search
  • Attack Path Techniques
  • Overview
  • Search
    • Links
    • Tenable Cloud
    • Tenable Community & Support
    • Tenable University
    • Settings
    • Severity
    • Theme
Detections
  • Plugins
  • Overview
  • Plugins Pipeline
  • Release Notes
  • Newest
  • Updated
  • Search
  • Nessus Families
  • WAS Families
  • NNM Families
  • LCE Families
  • Tenable OT Security Families
  • About Plugin Families
  • Audits
  • Overview
  • Newest
  • Updated
  • Search Audit Files
  • Search Items
  • References
  • Authorities
  • Documentation
  • Download All Audit Files
  • Indicators
  • Overview
  • Search
  • Indicators of Attack
  • Indicators of Exposure
Analytics
  • CVEs
  • Overview
  • Newest
  • Updated
  • Search
  • Attack Path Techniques
  • Overview
  • Search
  1. CVEs
  2. CVE-2025-26596
  1. CVEs

CVE-2025-26596

high
  • Information
  • CPEs
  • Plugins

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.

References

  • Advisories
  • More

https://access.redhat.com/security/cve/CVE-2025-26596

https://access.redhat.com/errata/RHSA-2025:7458

https://access.redhat.com/errata/RHSA-2025:7165

https://access.redhat.com/errata/RHSA-2025:7163

https://access.redhat.com/errata/RHSA-2025:2880

https://access.redhat.com/errata/RHSA-2025:2879

https://access.redhat.com/errata/RHSA-2025:2875

https://access.redhat.com/errata/RHSA-2025:2874

https://access.redhat.com/errata/RHSA-2025:2873

https://access.redhat.com/errata/RHSA-2025:2866

https://access.redhat.com/errata/RHSA-2025:2865

https://access.redhat.com/errata/RHSA-2025:2862

https://access.redhat.com/errata/RHSA-2025:2861

https://access.redhat.com/errata/RHSA-2025:2502

https://access.redhat.com/errata/RHSA-2025:2500

https://bugzilla.redhat.com/show_bug.cgi?id=2345256

Details

Source: Mitre, NVD

Published: 2025-02-25

Updated: 2025-05-13

Named Vulnerability: XkbSizeKeySyms Heap-based Buffer Overflow

Risk Information

CVSS v2

Base Score: 6.8

Vector: CVSS2#AV:L/AC:L/Au:S/C:C/I:C/A:C

Severity: Medium

CVSS v3

Base Score: 7.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Severity: High

EPSS

EPSS: 0.00023

  • Tenable.com
  • Community & Support
  • Documentation
  • Education
  • © 2025 Tenable®, Inc. All Rights Reserved
  • Privacy Policy
  • Legal
  • 508 Compliance