Integer Overflow Vulnerability in bpf Package

Kernel Updated 02 Oct 2025

Summary

19/10/2021

Disclosed on

N/A

Severity

No i

Fix available

Unrated

Severity

Not published

CVSS Score

GSD-2021-1001584: bpf: Fix integer overflow in prealloc_elems_and_freelist(). Affects Kernel versions >= 557c0c6e7df8e14a46bd7560d193fa5bbc00a858, < b14f28126c51533bb329379f65de5b0dd689b13a. No fix is published. How to fix ↓

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Background

The bpf package is a component of the Linux Kernel, which is responsible for implementing Berkeley Packet Filters (BPF). BPF is a virtual machine that allows user-defined programs to run in the kernel, enabling efficient packet filtering and network monitoring. The bpf package provides the necessary infrastructure and APIs for managing BPF programs and maps. However, a vulnerability has been discovered in the package that can lead to an integer overflow.

Vulnerability Detail

The integer overflow vulnerability in the bpf package occurs in the prealloc_elems_and_freelist() function. This vulnerability can be exploited by an attacker to cause a heap buffer overflow, potentially leading to arbitrary code execution or denial of service. The vulnerability was introduced in version v4.6 of the Linux Kernel and has been fixed in version v5.4.153. The impact and attack plausibility of this vulnerability have not been proven yet.

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 v5.4.153 or later. This update includes the commit b14f28126c51533bb329379f65de5b0dd689b13a, which addresses the integer overflow issue. Users can obtain the updated kernel from the official Linux Kernel repository: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/

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Conclusion

In conclusion, the bpf package in the Linux Kernel is vulnerable to an integer overflow issue. This vulnerability can potentially lead to arbitrary code execution or denial of service. It is crucial to update the Linux Kernel to version v5.4.153 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.

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