x86/sev: Annotate stack change in the #VC handler - Kernel
Summary
GSD-2022-1002739: x86/sev: Annotate stack change in the #VC handler. Affects Kernel versions >= a13644f3a53de4e95a7bce6459f834e832ea44c5, < 209a10f9559121da154d7dd024e26d0b0058624e. 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 is a critical component of the Linux operating system that provides core functionality and acts as an interface between hardware and software. It manages system resources, facilitates communication between different software components, and handles low-level operations. The vulnerability in question affects the Kernel's x86/sev module, which is responsible for handling Secure Encrypted Virtualization (SEV) on x86-based systems. SEV is a feature that enables the creation of isolated and encrypted virtual machines, enhancing security in cloud environments.
Vulnerability Detail
The vulnerability identified in the x86/sev module involves a missing annotation for a stack change in the #VC (Virtualization Control) handler. This issue could potentially be exploited by an attacker to execute arbitrary code or escalate privileges within a virtual machine running with SEV enabled. The absence of proper stack annotations may lead to stack corruption or other memory-related vulnerabilities. It is important to note that the impact and attack plausibility of this vulnerability have not been proven yet.
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
As this vulnerability has been fixed in the latest Kernel version, there is no specific workaround available. It is advised to update the Kernel to the patched version.
Conclusion
The x86/sev vulnerability in the Kernel's #VC handler has been addressed in the latest version of the Linux Kernel. It is crucial to update the Kernel to the patched version to ensure the necessary stack annotations are in place and mitigate the risk of exploitation. For further support on vulnerability remediation, please contact DevNack.com.
See every vulnerability recorded for Kernel →
FAQ
The Kernel is a critical component of the Linux operating system that provides core functionality and acts as an interface between hardware and software.
The x86/sev module is responsible for handling Secure Encrypted Virtualization (SEV) on x86-based systems, enhancing security in cloud environments.
The impact of this vulnerability is not yet proven, but it could potentially allow an attacker to execute arbitrary code or escalate privileges within a virtual machine running with SEV enabled.
To fix this vulnerability, it is recommended to update the Kernel to version v5.18.3 or any subsequent version that includes the fix.
No, as the vulnerability has been fixed in the latest Kernel version, updating to the patched version is the recommended solution.
Related vulnerabilities
Recent vulnerabilities recorded for Kernel.
