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CVE PROGRAM SOURCE RECORD6.7 Medium

CVE-2026-5164

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

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

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Red Hat Red Hat Enterprise Linux 10

Default version status: affected

Red Hat Red Hat Enterprise Linux 8

Default version status: unaffected

Red Hat Red Hat Enterprise Linux 9

Default version status: affected

References