Fix the definition of the fixmap area in powerpc/64

Kernel Updated 02 Oct 2025

Summary

31/05/2021

Disclosed on

N/A

Severity

No i

Fix available

Unrated

Severity

Not published

CVSS Score

GSD-2021-1000348: powerpc/64: Fix the definition of the fixmap area. Affects Kernel versions >= 265c3491c4bc8d40587996d6ee2f447a7ccfb4f3, < 4b9fb2c9039a206d37f215936a4d5bee7b1bf9cd. No fix is published. How to fix ↓

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Background

The powerpc/64 package is a component of the Linux Kernel, which is responsible for managing the PowerPC architecture on 64-bit systems. It provides support for various hardware features and system functionalities. The fixmap area is a reserved memory region used by the kernel for mapping frequently accessed kernel data structures. However, there is a vulnerability in the definition of the fixmap area that could potentially lead to security issues.

Vulnerability Detail

The vulnerability in the powerpc/64 package arises from an incorrect definition of the fixmap area. This vulnerability allows an attacker to exploit the system by manipulating the fixmap area, potentially leading to privilege escalation or arbitrary code execution. The impact and attack plausibility of this vulnerability have not been proven yet, but it is crucial to address it to ensure the security of the system.

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 v5.10.37 or later. The fix for this issue was implemented in commit 4b9fb2c9039a206d37f215936a4d5bee7b1bf9cd. Updating the kernel will ensure that the correct definition of the fixmap area is applied, mitigating the vulnerability.

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Conclusion

The powerpc/64 package in the Linux Kernel is vulnerable due to an incorrect definition of the fixmap area. To mitigate this vulnerability, it is crucial to update the kernel to version v5.10.37 or later. This update ensures that the fixmap area is correctly defined, reducing the risk of exploitation. For further support on vulnerability remediation, please contact DevNack.com.

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