CVE-2026-5164CWE-120

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

Medium · published March 30, 2026

CVSS v3.1
6.7
EPSS
0%
Percentile
4.7
In the wild
Unconfirmed
What it is

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).

The record
Technical detail
CVSS v3.1
6.7 · MEDIUM
Vector
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00160 · 4.7th percentile
Weakness
CWE-120 · Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Published
2026-03-30T15:02Z
EPSS history
Timeline
  • 30 MAR 15:02Z
    Virtio-win: virtio-win: denial of service via unvalidated descriptor count in unmap request
    cvelistv5