CVE-2026-5164: Red Hat Enterprise Linux

Medium severity, CVSS 5.5. EPSS: 0.2% chance of exploitation in the next 30 days.

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

• Red Hat Enterprise Linux: version 9.0 only; version 10.0 only
• Red Hat Virtio-Win: affected versions not specified

Published 2026-03-30. Last modified 2026-06-17.