CVE-2025-26595

HIGH EPSS 30.8%
Published Feb 25, 20251y ago · Modified Jun 25, 20264d ago
7.8 CVSS 3.1
High
Find Similar
Published Feb 25, 2025 1y ago
Last Modified Jun 25, 2026 4d ago

Description

A buffer overflow flaw was found in X.Org and Xwayland. The code in XkbVModMaskText() allocates a fixed-sized buffer on the stack and copies the names of the virtual modifiers to that buffer. The code fails to check the bounds of the buffer and would copy the data regardless of the size.

CVSS Details

Base Score
7.8
Exploitability
1.8
Impact
5.9
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
30.8% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 2

CWE-121
CWE-787 Out-of-bounds Write Memory Safety

Affected Products 6

VendorProductVersionRange
tigervnctigervnc*any
x.orgx_server* <21.1.16
x.orgxwayland* <24.1.6
redhatenterprise_linux7.0any
redhatenterprise_linux8.0any
redhatenterprise_linux9.0any

References 18

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.