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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).

PUBLISHED Reserved 2026-03-30 | Published 2026-03-30 | Updated 2026-04-28 | Assigner redhat




MEDIUM: 6.7CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Problem types

Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

Product status

Default status
affected

Default status
unaffected

Default status
affected

Timeline

2026-03-30:Reported to Red Hat.
2026-03-30:Made public.

References

access.redhat.com/security/cve/CVE-2026-5164 vdb-entry

bugzilla.redhat.com/show_bug.cgi?id=2453014 (RHBZ#2453014) issue-tracking

github.com/virtio-win/kvm-guest-drivers-windows/pull/1504

cve.org (CVE-2026-5164)

nvd.nist.gov (CVE-2026-5164)

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