Vulnerability in bpf: Fix a btf decl_tag bug when tagging a function

Kernel Updated 02 Oct 2025

Summary

24/04/2022

Disclosed on

N/A

Severity

No i

Fix available

Unrated

Severity

Not published

CVSS Score

GSD-2022-1001548: bpf: Fix a btf decl_tag bug when tagging a function. Affects Kernel versions >= b5ea834dde6b6e7f75e51d5f66dac8cd7c97b5ef, < a3bcd2110c087bc62e90fddd4a93237b049d6e68. 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 Filter (BPF) functionality. BPF allows for efficient packet filtering and network analysis within the kernel. It provides a virtual machine that executes user-defined programs to process network packets. The bpf package is an integral part of the Linux Kernel and is widely used in various networking applications.

Vulnerability Detail

The bpf package is affected by a bug related to the declaration tag (decl_tag) when tagging a function. This vulnerability was introduced in version v5.16 of the Linux Kernel and fixed in version v5.16.19. The bug could potentially lead to security vulnerabilities, although the actual impact and attack plausibility have not been proven. Further technical details about the vulnerability can be found in the references link provided.

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 v5.16.19 or later. This update includes the necessary patch to address the btf decl_tag bug. Users can obtain the updated kernel from the official Linux Kernel repository.

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Workaround

There is no specific workaround mentioned for this vulnerability. The recommended solution is to update the Linux Kernel to the fixed version.

Conclusion

In conclusion, the bpf package in the Linux Kernel is affected by a vulnerability related to the btf decl_tag bug. It is recommended to update the Linux Kernel to version v5.16.19 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.

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