The paging_invlpg function in include/asm-x86/paging.h in Xen 3.3.x through 4.6.x, when using shadow mode paging or nested virtualization is enabled, allows local HVM guest users to cause a denial of service (host crash) via a non-canonical guest address in an INVVPID instruction, which triggers a hypervisor bug check.
This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 6.3, indicating it can be exploited remotely over the network but requires specific conditions to be met without requiring user interaction requiring only low-level privileges . The vulnerability impacts and availability (service disruption) for affected systems. Impacting 2 products from citrix, from xen organizations running these solutions should prioritize assessment and patching.
First disclosed in 2016, 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.
2016-01-22T15:59:06.867
2025-04-12T10:46:40.837
Deferred
CVSSv3.0: 6.3 (MEDIUM)
AV:L/AC:M/Au:N/C:N/I:N/A:C
3.4
6.9
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Application | citrix | xenserver | ≤ 6.5 | Yes |
| Operating System | xen | xen | 3.3.0 | Yes |
| Operating System | xen | xen | 3.3.1 | Yes |
| Operating System | xen | xen | 3.3.2 | Yes |
| Operating System | xen | xen | 3.4.0 | Yes |
| Operating System | xen | xen | 3.4.1 | Yes |
| Operating System | xen | xen | 3.4.2 | Yes |
| Operating System | xen | xen | 3.4.3 | Yes |
| Operating System | xen | xen | 3.4.4 | Yes |
| Operating System | xen | xen | 4.1.0 | Yes |
| Operating System | xen | xen | 4.1.1 | Yes |
| Operating System | xen | xen | 4.1.2 | Yes |
| Operating System | xen | xen | 4.1.3 | Yes |
| Operating System | xen | xen | 4.1.4 | Yes |
| Operating System | xen | xen | 4.1.5 | Yes |
| Operating System | xen | xen | 4.1.6 | Yes |
| Operating System | xen | xen | 4.1.6.1 | Yes |
| Operating System | xen | xen | 4.2.0 | Yes |
| Operating System | xen | xen | 4.2.1 | Yes |
| Operating System | xen | xen | 4.2.2 | Yes |
| Operating System | xen | xen | 4.2.3 | Yes |
| Operating System | xen | xen | 4.2.4 | Yes |
| Operating System | xen | xen | 4.2.5 | Yes |
| Operating System | xen | xen | 4.3.0 | Yes |
| Operating System | xen | xen | 4.3.1 | Yes |
| Operating System | xen | xen | 4.3.2 | Yes |
| Operating System | xen | xen | 4.3.3 | Yes |
| Operating System | xen | xen | 4.3.4 | Yes |
| Operating System | xen | xen | 4.4.0 | Yes |
| Operating System | xen | xen | 4.4.0 | Yes |
| Operating System | xen | xen | 4.4.1 | Yes |
| Operating System | xen | xen | 4.4.2 | Yes |
| Operating System | xen | xen | 4.4.3 | Yes |
| 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 | 4.6.0 | 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 citrix'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.