Vulnerability-Lookup

GHSA-6457-73J6-H3QG

Vulnerability from github – Published: 2026-03-30 15:32 – Updated: 2026-03-30 15:32

Details

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).

Severity ?

6.7 (Medium)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-5164"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-120"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-03-30T15:16:36Z",
    "severity": "MODERATE"
  },
  "details": "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).",
  "id": "GHSA-6457-73j6-h3qg",
  "modified": "2026-03-30T15:32:07Z",
  "published": "2026-03-30T15:32:07Z",
  "references": [
    {
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      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-5164"
    },
    {
      "type": "WEB",
      "url": "https://github.com/virtio-win/kvm-guest-drivers-windows/pull/1504"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2026-5164"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2453014"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-5164 (GCVE-0-2026-5164)

Vulnerability from cvelistv5 – Published: 2026-03-30 15:02 – Updated: 2026-03-30 15:30

Title

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

Summary

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).

Severity ?

6.7 (Medium)


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

CWE

CWE-120 - Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

Assigner

redhat

References

URL

Tags

	https://access.redhat.com/security/cve/CVE-2026-5164	vdb-entryx_refsource_REDHAT
	https://bugzilla.redhat.com/show_bug.cgi?id=2453014	issue-trackingx_refsource_REDHAT
	https://github.com/virtio-win/kvm-guest-drivers-w…

Impacted products

Vendor

Product

Version

Red Hat

Red Hat Enterprise Linux 10

cpe:/o:redhat:enterprise_linux:10

	Red Hat	Red Hat Enterprise Linux 8	cpe:/o:redhat:enterprise_linux:8
	Red Hat	Red Hat Enterprise Linux 9	cpe:/o:redhat:enterprise_linux:9

Date Public ?

2026-03-30 12:34

Show details on NVD website

JSON

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                  },
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                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-03-30T15:19:30.452989Z",
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Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-6457-73J6-H3QG

CVE-2026-5164 (GCVE-0-2026-5164)

Tags

Sightings

Nomenclature