KVM: arm64: Fix host stage-2 PGD refcount
Summary
UVI-2021-1001894: KVM: arm64: Fix host stage-2 PGD refcount. Affects Kernel versions >= 1025c8c0c6accfcbdc8f52ca1940160f65cd87d6, < b372264c66ef78f2cab44e877fbd765ad6d24c39. 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 critical component of the Linux operating system. It provides the core functionality and interfaces for the system's hardware, software, and processes. The Kernel package includes various subsystems, including KVM (Kernel-based Virtual Machine), which allows running virtual machines on the host system. The arm64 architecture is specifically designed for 64-bit ARM processors. In the arm64 implementation of KVM, there is a vulnerability related to the host stage-2 PGD (Page Global Directory) refcount.
Vulnerability Detail
The vulnerability in the KVM arm64 implementation affects the host stage-2 PGD refcount. The issue was introduced in Linux Kernel version v5.13 by commit 1025c8c0c6accfcbdc8f52ca1940160f65cd87d6 and fixed in version v5.14.15 by commit b372264c66ef78f2cab44e877fbd765ad6d24c39. The exact impact and attack plausibility of this vulnerability have not been proven yet. However, if exploited, it could potentially lead to security breaches or system instability in environments utilizing KVM on arm64 architecture.
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 →
Conclusion
The KVM arm64 vulnerability related to the host stage-2 PGD refcount can potentially pose security risks or system instability. It is crucial to update the Linux Kernel package to version v5.14.15 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
See every vulnerability recorded for Kernel →
FAQ
The impact of this vulnerability is not yet proven, but it could potentially lead to security breaches or system instability in environments utilizing KVM on arm64 architecture.
You can use the Vulert Playground at Vulert Scanner to check if your system is affected by this vulnerability. Simply upload your package-lock.json file and it will provide real-time alerts for open-source vulnerabilities, including this one.
No specific workaround has been provided for this vulnerability. It is recommended to update the Linux Kernel package to the fixed version.
The exact attack vector and exploitability of this vulnerability have not been proven yet. However, it is always advisable to keep systems up to date to mitigate potential risks.
You can find more information about this vulnerability in the Open Source Vulnerability database maintained by the Cloud Security Alliance. The specific vulnerability ID is UVI-2021-1001894.
Related vulnerabilities
Recent vulnerabilities recorded for Kernel.
