libbpf: Fix signed overflow in ringbuf_process_ring
Summary
GSD-2021-1000329: libbpf: Fix signed overflow in ringbuf_process_ring. Affects Kernel versions >= bf99c936f9478a05d51e9f101f90de70bee9a89c, < 4aae6eb6af7d1ac2ee5762077892185884d8f169. 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 libbpf package is a library for interacting with the Berkeley Packet Filter (BPF) virtual machine in the Linux kernel. It provides a high-level interface for loading and interacting with BPF programs. The ringbuf_process_ring function in libbpf is responsible for processing data in a ring buffer. However, a signed overflow vulnerability was discovered in this function.
Vulnerability Detail
The signed overflow vulnerability in ringbuf_process_ring can lead to potential security issues. An attacker could exploit this vulnerability to cause a denial-of-service (DoS) condition or potentially execute arbitrary code with kernel privileges. The vulnerability was introduced in version v5.8 of the Linux Kernel and was fixed in version v5.10.38.
How To Fix
No fixed version is published for this vulnerability.
To fix this vulnerability, it is recommended to update the Linux Kernel to version v5.10.38 or later. This can be done by pulling the latest updates from the official Linux Kernel repository and rebuilding the kernel. Alternatively, users can wait for their Linux distribution to release an updated kernel package.
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 mentioned in the 'how_to_fix' section.
Conclusion
The libbpf package is vulnerable to a signed overflow in the ringbuf_process_ring function. This vulnerability can lead to potential security issues, including a denial-of-service condition or arbitrary code execution with kernel privileges. It is crucial to update the Linux Kernel to version v5.10.38 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
See every vulnerability recorded for Kernel →
FAQ
Libbpf is a library for interacting with the Berkeley Packet Filter (BPF) virtual machine in the Linux kernel. It provides a high-level interface for loading and interacting with BPF programs.
ringbuf_process_ring is a function in libbpf responsible for processing data in a ring buffer.
A signed overflow vulnerability occurs when a signed integer value exceeds its maximum range, resulting in undefined behavior. In the case of this vulnerability, it can lead to security issues.
This vulnerability can potentially lead to a denial-of-service (DoS) condition or allow an attacker to execute arbitrary code with kernel privileges.
To fix this vulnerability, it is recommended to update the Linux Kernel to version v5.10.38 or later.
Related vulnerabilities
Recent vulnerabilities recorded for Kernel.
Follow Vulert in Google
Get more Vulert vulnerability and dependency-security updates in Google Search and AI results.