Vulnerability in Kernel: x86/fpu: Invalidate FPU state after a failed XRSTOR from a user buffer
Summary
GSD-2021-1001083: x86/fpu: Invalidate FPU state after a failed XRSTOR from a user buffer. Affects Kernel versions >= 1d731e731c4cd7cbd3b1aa295f0932e7610da82f, < 002665dcba4bbec8c82f0aeb4bd3f44334ed2c14. 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 functionalities and acts as an interface between hardware and software. It manages system resources, facilitates communication between different software components, and ensures the overall stability and security of the system. The vulnerability in question affects the x86/fpu module within the Kernel. The x86/fpu module is responsible for handling floating-point operations and managing the Floating Point Unit (FPU) of the processor. This vulnerability specifically pertains to the handling of XRSTOR instructions from a user buffer.
Vulnerability Detail
The vulnerability arises from a failure to properly invalidate the FPU state after a failed XRSTOR instruction from a user buffer. An attacker could exploit this vulnerability to gain unauthorized access to sensitive information or execute arbitrary code with elevated privileges. The vulnerability was introduced in version v5.2 of the Linux Kernel and was fixed in version v5.12.13. 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
There is no known workaround for this vulnerability at the moment.
Conclusion
In conclusion, the vulnerability in the Kernel's x86/fpu module could potentially lead to unauthorized access or arbitrary code execution. It is crucial to update the Linux Kernel to version v5.12.13 or later to mitigate this vulnerability. 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 functionalities and acts as an interface between hardware and software.
The x86/fpu module is responsible for handling floating-point operations and managing the Floating Point Unit (FPU) of the processor.
XRSTOR is an instruction used to restore the state of the FPU from a given memory location.
An attacker could exploit this vulnerability to gain unauthorized access to sensitive information or execute arbitrary code with elevated privileges.
No, the impact and attack plausibility of this vulnerability have not been proven yet.
Related vulnerabilities
Recent vulnerabilities recorded for Kernel.
