CVE-2025-26596

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.

CVSS v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	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/errata/RHSA-2025:7163
https://access.redhat.com/errata/RHSA-2025:7165
https://access.redhat.com/errata/RHSA-2025:7458
https://access.redhat.com/security/cve/CVE-2025-26596	Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2345256	Issue Tracking
https://lists.debian.org/debian-lts-announce/2025/02/msg00036.html

Configurations

Configuration 1 (hide)

cpe:2.3:a:tigervnc:tigervnc:-:*:*:*:*:*:*:*

Configuration 2 (hide)

OR	cpe:2.3:a:x.org:x_server::::::::
	cpe:2.3:a:x.org:xwayland::::::::

Configuration 3 (hide)

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:::::::*

History

No history.

Information

Published : 2025-02-25 16:15

Updated : 2025-11-03 22:18

NVD link : CVE-2025-26596

Mitre link : CVE-2025-26596

CVE.ORG link : CVE-2025-26596

JSON object : View

Products Affected

redhat

enterprise_linux

x.org

xwayland
x_server

tigervnc

tigervnc

CWE

CWE-787

Out-of-bounds Write

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