CVE-2026-5164: A flaw was found in virtio-win. The `RhelDoUnMap()` function does not properly validate the number of descriptors…
CVE-2026-5164 · Severity: medium · CVSS 6.7 · Published 2026-03-30
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).
No. Junglewise Threat Intelligence has no report of CVE-2026-5164 being exploited in the wild.
How severe is CVE-2026-5164?
Medium severity, with a CVSS score of 6.7, published 30 March 2026.
Which products and versions are affected?
Redhat Enterprise Linux, Redhat Virtio-Win. The advisory does not name versions.
Is there a fix for CVE-2026-5164?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
Am I affected by CVE-2026-5164?
Check whether you run Redhat Enterprise Linux or Redhat Virtio-Win. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.