The PV superpage functionality in arch/x86/mm.c in Xen 3.4.0, 3.4.1, and 4.1.x through 4.6.x allows local PV guests to obtain sensitive information, cause a denial of service, gain privileges, or have unspecified other impact via a crafted page identifier (MFN) to the (1) MMUEXT_MARK_SUPER or (2) MMUEXT_UNMARK_SUPER sub-op in the HYPERVISOR_mmuext_op hypercall or (3) unknown vectors related to page table updates.
This vulnerability carries a HIGH severity rating with a CVSS v3.1 score of 8.5, 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 confidentiality (data exposure), integrity (unauthorized modifications), and availability (service disruption) for affected systems. Impacting 1 product 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.
2016-01-22T15:59:05.913
2025-04-12T10:46:40.837
Deferred
CVSSv3.0: 8.5 (HIGH)
AV:L/AC:M/Au:N/C:C/I:C/A:C
3.4
10.0
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Operating System | xen | xen | 3.4.0 | Yes |
| Operating System | xen | xen | 3.4.1 | 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 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.