KVM: SVM: Use kzalloc for sev ioctl interfaces to prevent kernel data leak
Summary
GSD-2022-1003179: KVM: SVM: Use kzalloc for sev ioctl interfaces to prevent kernel data leak. Affects Kernel versions >= eaf78265a4ab33935d3a0f1407ce4a91aac4d4d5, < bbdcc644b59e01e98c68894a9fab42b9687f42b0. No fix is published. How to fix ↓
Check if this vulnerability affects your application
Upload a manifest or SBOM and we'll show whether you're affected, plus every other risky package in the same scan.
No signup required · Results in about 60 seconds
Background
The Kernel package is a fundamental component of the Linux operating system. It provides the core functionality and interfaces for the system's hardware, software, and user applications. The Kernel package is responsible for managing system resources, handling device drivers, and facilitating communication between different components of the operating system. This vulnerability specifically affects the Kernel package's SVM (Secure Virtual Machine) module, which is responsible for providing hardware-assisted virtualization capabilities on AMD processors.
Vulnerability Detail
The vulnerability in the SVM module of the Kernel package allows for a kernel data leak. By exploiting this vulnerability, an attacker could potentially access sensitive information from the kernel memory, leading to unauthorized disclosure of data and potential privilege escalation. The vulnerability was introduced in version v5.7 of the Linux Kernel and was fixed in version v5.17.13. The fix involves using kzalloc instead of kmalloc for sev ioctl interfaces, which ensures that the allocated memory is zeroed out, preventing any potential data leaks.
How To Fix
No fixed version is published for this vulnerability.
Tip — Not sure whether your app is affected? Vulert can check the versions your app actually runs. Scan free →
Workaround
There is no specific workaround mentioned for this vulnerability. The recommended solution is to apply the fix by updating the Linux Kernel package.
Conclusion
The vulnerability in the SVM module of the Kernel package could allow for a kernel data leak, potentially leading to unauthorized disclosure of data and privilege escalation. It is crucial to update the Linux Kernel package to version v5.17.13 or later to mitigate this vulnerability. Users can also utilize the Vulert Playground (https://vulert.com/scanner) to check if their system is affected by this vulnerability. For further support on vulnerability remediation, contact DevNack.com.
See every vulnerability recorded for Kernel →
FAQ
This vulnerability could allow an attacker to access sensitive information from the kernel memory, potentially leading to unauthorized disclosure of data and privilege escalation.
You can use the Vulert Playground (https://vulert.com/scanner) to check if your system is affected by this vulnerability. Simply upload your package-lock.json file and the Vulert Playground will analyze it for any known vulnerabilities, including this one.
At the time of this report, there are no known exploits for this vulnerability. However, it is important to apply the fix as soon as possible to mitigate any potential risks.
No, this vulnerability requires local access to the system in order to exploit it.
For further support on vulnerability remediation, you can contact info@devnack.com. They can provide guidance and assistance in fixing this vulnerability.
Related vulnerabilities
Recent vulnerabilities recorded for Kernel.
