rxrpc: Fix rxrpc_local leak in rxrpc_lookup_peer() in Kernel
Summary
GSD-2021-1002420: rxrpc: Fix rxrpc_local leak in rxrpc_lookup_peer(). Affects Kernel versions >= e8e51ce79c157188e209e5ea0afaf6b42dd76104, < 913c24af2d13a3fd304462916ee98e298d56bdce. 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 manages the system's resources and facilitates communication between hardware and software. It provides essential functions such as process management, memory management, and device drivers. The rxrpc module is responsible for managing the Remote Procedure Call (RPC) protocol in the Linux Kernel. RPC allows programs to communicate across a network by executing procedures on remote systems.
The vulnerability in rxrpc_lookup_peer() function can lead to a local memory leak in the rxrpc module. This can potentially exhaust system resources and cause a denial-of-service condition. The vulnerability was introduced in version v4.19.82 of the Linux Kernel and has been fixed in version v4.19.220.
Vulnerability Detail
The vulnerability in rxrpc_lookup_peer() function can be exploited by an attacker to cause a local memory leak in the rxrpc module. By repeatedly invoking the function with crafted parameters, an attacker can exhaust system resources, leading to a denial-of-service condition. This vulnerability can be triggered by a local user with the ability to execute arbitrary code on the affected system.
The vulnerability was introduced in version v4.19.82 of the Linux Kernel and has been fixed in version v4.19.220 by commit 913c24af2d13a3fd304462916ee98e298d56bdce.
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. It is recommended to apply the fix as soon as possible.
Conclusion
The vulnerability in the rxrpc_lookup_peer() function of the rxrpc module in the Linux Kernel can lead to a local memory leak and potential denial-of-service. It is crucial to update the Kernel to version v4.19.220 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
See every vulnerability recorded for Kernel →
FAQ
This vulnerability can lead to a local memory leak in the rxrpc module, potentially causing a denial-of-service condition.
A local user with the ability to execute arbitrary code on the affected system can exploit this vulnerability.
There is no information available regarding exploitation of this vulnerability in the wild.
This vulnerability was discovered through code analysis and review.
The only known mitigation is to update the Linux Kernel to the fixed version.
Related vulnerabilities
Recent vulnerabilities recorded for Kernel.
