Vulnerability in Kernel: block, bfq: don't move oom_bfqq

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-2022-1001161: block, bfq: don't move oom_bfqq. Affects Kernel versions < c01fced8d38fbccc82787065229578006f28e020. No fix is published. How to fix ↓

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Background

The Kernel is a critical component of the Linux operating system that manages communication between hardware and software. It provides essential functions and services for the proper functioning of the system. The block layer in the Kernel is responsible for managing block devices such as hard drives and SSDs. The bfq (Budget Fair Queueing) is a block I/O scheduler that aims to provide fairness and low latency for I/O operations. However, a vulnerability has been discovered in the Kernel's block layer, specifically in the bfq scheduler.

Vulnerability Detail

The vulnerability in the Kernel's block layer, related to the bfq scheduler, allows an attacker to potentially exploit the system's Out-of-Memory (OOM) handling. By manipulating the oom_bfqq (OOM Budget Fair Queueing Queue) in a certain way, an attacker could disrupt the fair allocation of resources and potentially cause denial-of-service conditions or other unexpected behavior. The impact and attack plausibility of this vulnerability have not been proven yet.

How To Fix

No fixed version is published for this vulnerability.

The vulnerability has been addressed in the Linux Kernel version v5.17.2 through commit c01fced8d38fbccc82787065229578006f28e020. To fix the vulnerability, it is recommended to update the Kernel to this version or any subsequent version that includes the fix.

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Workaround

No specific workaround has been mentioned for this vulnerability.

Conclusion

The vulnerability in the Kernel's block layer, related to the bfq scheduler, has been identified and fixed in the Linux Kernel version v5.17.2. It is crucial to update the Kernel to this version or a newer one to ensure the security and stability of the system. For further support on vulnerability remediation, please contact DevNack.com.

See every vulnerability recorded for Kernel →