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Medium · 6.7 CVE-2026-5164 EUVD-2026-17111GHSA-6457-73j6-h3qg

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

Published Mar 30, 2026 · Updated Nov 5, 2026 · Assigned by redhat

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

VendorProductAffectedFixed
Red Hat Red Hat Enterprise Linux 10 — —
Red Hat Red Hat Enterprise Linux 8 — —
Red Hat Red Hat Enterprise Linux 9 — —

References