CVE-2025-26597 Information

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.

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Reference

https://access.redhat.com/security/cve/CVE-2025-26597 https://bugzilla.redhat.com/show_bug.cgi?id=2345255

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

7.8