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).
Affected products
redhat: virtio-win; redhat: enterprise linux
References3
- access.redhat.com/security/cve/CVE-2026-5164 Vendor Advisory
- bugzilla.redhat.com/show_bug.cgi?id=2453014 Issue TrackingVendor Advisory
- github.com/virtio-win/kvm-guest-drivers-windows/pull/1504 Issue TrackingPatch
Metrics
- CVSS 3.1
-
5.5
MEDIUM
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 0% percentile: 1 · as of 12 November 2026
- CWE
- CWE-120
Could this be exploited in your environment?
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