CVE-2026-5164 — MEDIUM (6.7)

Vulnerability 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).

CVSS Score

6.7

MEDIUM

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

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Redhat	Virtio-Win	-
Redhat	Enterprise Linux	9.0

Related Weaknesses (CWE)

CWE-120

References

https://access.redhat.com/security/cve/CVE-2026-5164Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2453014Issue TrackingVendor Advisory
https://github.com/virtio-win/kvm-guest-drivers-windows/pull/1504Issue TrackingPatch

FAQ

What is CVE-2026-5164?

CVE-2026-5164 is a vulnerability with a CVSS score of 6.7 (MEDIUM). 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 vali...

How severe is CVE-2026-5164?

CVE-2026-5164 has been rated MEDIUM with a CVSS base score of 6.7/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-5164?

Check the references section above for vendor advisories and patch information. Affected products include: Redhat Virtio-Win, Redhat Enterprise Linux.