CVE-2026-5164

MEDIUM

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

Title source: cna
STIX 2.1

Description

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).

References (3)

Core 3
Core References
Vdb Entry, X_Refsource_Redhat vdb-entry x_refsource_redhat
https://access.redhat.com/security/cve/CVE-2026-5164
Issue Tracking, X_Refsource_Redhat issue-tracking x_refsource_redhat
RHBZ#2453014
https://bugzilla.redhat.com/show_bug.cgi?id=2453014

Scores

CVSS v3 6.7
EPSS 0.0011
EPSS Percentile 1.6%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-120
Status published
Products (6)
Red Hat/Red Hat Enterprise Linux 10
Red Hat/Red Hat Enterprise Linux 8
Red Hat/Red Hat Enterprise Linux 9
redhat/enterprise_linux 9.0
redhat/enterprise_linux 10.0
redhat/virtio-win
Published Mar 30, 2026
Tracked Since Mar 30, 2026