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CVE-2026-5164 Details

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).

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:5.5 MEDIUMVector:CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CNA: [email protected]CVSS-B:6.7 MEDIUMVector:CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://access.redhat.com/security/cve/CVE-2026-5164	[email protected]	Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2453014	[email protected]	Issue TrackingVendor Advisory
https://github.com/virtio-win/kvm-guest-drivers-windows/pull/1504	[email protected]	Issue TrackingPatch

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-120	Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')	[email protected]

Affected Products

Product	Versions
redhat virtio-win	All versions
CPE cpe:2.3:a:redhat:virtio-win:-:::::::* Remediation No remediation found in references.
redhat enterprise linux	9.0 10.0
CPE cpe:2.3:o:redhat:enterprise_linux:9.0:::::::* cpe:2.3:o:redhat:enterprise_linux:10.0:::::::* Remediation No remediation found in references.

Change History

4 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	[email protected]
Jun 17, 2026	CVE Modified	CISA-ADP
Apr 28, 2026	Initial Analysis	[email protected]
Mar 30, 2026	New CVE Received	[email protected]