CVE-2026-62428 - Vulnerability Details - OpenCVE

When grant-copy operations are processed, the respective grant may or may not already be in use by another operation (a mapping or another copy). For all copy operations the referenced guest frame is looked up. When another operation is already active for the grant (the grant is "pinned"), what is being supplied back to actually carry out permission checks and copy operation may not be consistent: The permission check may be carried out on a page different from the one involved in the copy.

No CVSS v4.0

Attack Vector Local

Attack Complexity High

Privileges Required Low

Scope Changed

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable no

Technical Impact total

No data.

No data.

No data.

No data.

References

Link	Providers
https://xenbits.xenproject.org/xsa/advisory-500.html

History

Tue, 28 Jul 2026 16:15:00 +0000

Type	Values Removed	Values Added
Description		When grant-copy operations are processed, the respective grant may or may not already be in use by another operation (a mapping or another copy). For all copy operations the referenced guest frame is looked up. When another operation is already active for the grant (the grant is "pinned"), what is being supplied back to actually carry out permission checks and copy operation may not be consistent: The permission check may be carried out on a page different from the one involved in the copy.
Title		grant-table: type confusion in grant-copy
Weaknesses		CWE-367
References		https://xenbits.xenproject.org/xsa/advisory-500.html
Metrics		cvssV3_1 `{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H'}` ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}`

MITRE

Status: PUBLISHED

Assigner: XEN

Published: 2026-07-28T12:32:07.573Z

Updated: 2026-07-28T16:33:28.183Z

Reserved: 2026-07-14T10:28:12.655Z

Link: CVE-2026-62428

Vulnrichment

Updated: 2026-07-28T16:33:28.183Z

NVD

No data.

Redhat

No data.

OpenCVE Enrichment

No data.

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