netfilter: nf_tables: Fix oversized kvmalloc() calls in Kernel
Summary
GSD-2021-1001634: netfilter: nf_tables: Fix oversized kvmalloc() calls. Affects Kernel versions < 96f439a7eda6e80b1f45a97da7d3020b259b04a4. 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 manages system resources. It includes various subsystems, such as netfilter, which handles network packet filtering and manipulation. Netfilter relies on nf_tables, a framework for configuring firewall rules and network address translation (NAT). However, a vulnerability has been discovered in nf_tables that involves oversized kvmalloc() calls.
Vulnerability Detail
The vulnerability in nf_tables arises from the use of oversized kvmalloc() calls. This can lead to memory allocation failures and potential memory corruption issues. An attacker could potentially exploit this vulnerability to execute arbitrary code or cause a denial-of-service (DoS) condition. The impact and attack plausibility of this vulnerability have not yet been proven.
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
No specific workaround has been provided for this vulnerability.
Conclusion
The nf_tables vulnerability involving oversized kvmalloc() calls in the Kernel has been identified and fixed in Linux Kernel version v5.10.71. Users are advised to update their Kernel to the patched version to mitigate the risk of potential memory corruption and arbitrary code execution. For further support on vulnerability remediation, please contact DevNack.com.
See every vulnerability recorded for Kernel →
FAQ
The impact of this vulnerability could potentially allow an attacker to execute arbitrary code or cause a denial-of-service (DoS) condition.
You can use Vulert Playground (https://vulert.com/scanner) to check if your system is affected by this vulnerability. Simply upload your package-lock.json file and Vulert will analyze it for open-source vulnerabilities in real-time.
At the time of this report, there is no known exploit for this vulnerability. However, it is important to apply the necessary patches and updates to mitigate the risk.
The primary mitigation for this vulnerability is to update the Kernel to the patched version. Regularly updating the Kernel is recommended to ensure the latest security fixes are applied.
You can find more information about this vulnerability in the Open Source Vulnerability Database (OSVDB) entry: https://github.com/cloudsecurityalliance/gsd-database/blob/main/2021/1001xxx/GSD-2021-1001634.json
Related vulnerabilities
Recent vulnerabilities recorded for Kernel.
