Xen maintains the _GTF_{read,writ}ing bits as appropriate, to inform the guest that a grant is in use. A guest is expected not to modify the grant details while it is in use, whereas the guest is free to modify/reuse the grant entry when it is not in use. Under some circumstances, Xen will clear the status bits too early, incorrectly informing the guest that the grant is no longer in use. A guest may prematurely believe that a granted frame is safely private again, and reuse it in a way which contains sensitive information, while the domain on the far end of the grant is still using the grant. Xen 4.9, 4.8, 4.7, 4.6, and 4.5 are affected.
This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 6.5, requiring local system access to exploit with relatively low complexity without requiring user interaction requiring only low-level privileges . The vulnerability impacts confidentiality (data exposure), for affected systems. Impacting 1 product from xen organizations running these solutions should prioritize assessment and patching.
First disclosed in 2017, this vulnerability was reported during a period defined by widespread IoT adoption challenges, mobile security concerns, and the emergence of advanced persistent threat (APT) techniques. Contemporary mitigation strategies focused on secure development practices and third-party component vetting.
2017-08-15T16:29:00.233
2025-04-20T01:37:25.860
Deferred
CVSSv3.0: 6.5 (MEDIUM)
AV:L/AC:L/Au:N/C:P/I:N/A:N
3.9
2.9
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Operating System | xen | xen | 4.5.0 | Yes |
| Operating System | xen | xen | 4.5.1 | Yes |
| Operating System | xen | xen | 4.5.2 | Yes |
| Operating System | xen | xen | 4.5.3 | Yes |
| Operating System | xen | xen | 4.5.5 | Yes |
| Operating System | xen | xen | 4.6.0 | Yes |
| Operating System | xen | xen | 4.6.1 | Yes |
| Operating System | xen | xen | 4.6.3 | Yes |
| Operating System | xen | xen | 4.6.4 | Yes |
| Operating System | xen | xen | 4.6.5 | Yes |
| Operating System | xen | xen | 4.6.6 | Yes |
| Operating System | xen | xen | 4.7.0 | Yes |
| Operating System | xen | xen | 4.7.1 | Yes |
| Operating System | xen | xen | 4.7.2 | Yes |
| Operating System | xen | xen | 4.7.3 | Yes |
| Operating System | xen | xen | 4.8.0 | Yes |
| Operating System | xen | xen | 4.8.1 | Yes |
| Operating System | xen | xen | 4.9.0 | Yes |
SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For xen's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.