The patch_instruction function in hw/i386/kvmvapic.c in QEMU does not initialize the imm32 variable, which allows local guest OS administrators to obtain sensitive information from host stack memory by accessing the Task Priority Register (TPR).
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 12 products from qemu, from canonical, from debian and 9 others, 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.
2016-05-25T15:59:04.927
2025-04-12T10:46:40.837
Deferred
CVSSv3.1: 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? |
|---|---|---|---|---|
| Application | qemu | qemu | ≤ 2.6.2 | Yes |
| Operating System | canonical | ubuntu_linux | 12.04 | Yes |
| Operating System | canonical | ubuntu_linux | 14.04 | Yes |
| Operating System | canonical | ubuntu_linux | 15.10 | Yes |
| Operating System | canonical | ubuntu_linux | 16.04 | Yes |
| Operating System | debian | debian_linux | 8.0 | Yes |
| Application | redhat | openstack | 6.0 | Yes |
| Application | redhat | openstack | 7.0 | Yes |
| Application | redhat | openstack | 8 | Yes |
| Application | redhat | openstack | 9 | Yes |
| Application | redhat | openstack | 10 | Yes |
| Application | redhat | openstack | 11 | Yes |
| Operating System | redhat | enterprise_linux_desktop | 7.0 | Yes |
| Operating System | redhat | enterprise_linux_eus | 7.4 | Yes |
| Operating System | redhat | enterprise_linux_eus | 7.5 | Yes |
| Operating System | redhat | enterprise_linux_eus | 7.6 | Yes |
| Operating System | redhat | enterprise_linux_eus | 7.7 | Yes |
| Operating System | redhat | enterprise_linux_server | 7.0 | Yes |
| Operating System | redhat | enterprise_linux_server_aus | 7.4 | Yes |
| Operating System | redhat | enterprise_linux_server_aus | 7.6 | Yes |
| Operating System | redhat | enterprise_linux_server_aus | 7.7 | Yes |
| Operating System | redhat | enterprise_linux_server_tus | 7.6 | Yes |
| Operating System | redhat | enterprise_linux_server_tus | 7.7 | Yes |
| Operating System | redhat | enterprise_linux_workstation | 7.0 | Yes |
| Application | redhat | virtualization | 4.0 | Yes |
| Operating System | redhat | enterprise_linux | 7.0 | No |
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 qemu'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.