CVE-2026-5164 MEDIUM

CVE-2026-5164: Virtio-win: virtio-win: denial of service via unvalidated descriptor count in unmap request

Vendor Red Hat
Product Red Hat Enterprise Linux 10
Weakness CWE-120
Published March 30, 2026
Last update April 28, 2026

CVSS base score

6.7/10
Attack vector Local
Attack complexity Low
Privileges required High
User interaction None
Confidentiality High
Integrity High

CVSS vector

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

What the vulnerability does

01Description

A flaw was found in virtio-win. The `RhelDoUnMap()` function does not properly validate the number of descriptors provided by a user during an unmap request. A local user could exploit this input validation vulnerability by supplying an excessive number of descriptors, leading to a buffer overrun. This can cause a system crash, resulting in a Denial of Service (DoS).

Key dates

02Disclosure timeline

March 30, 2026 CVE published
April 28, 2026 Record updated