Out-of-Bound Access in isofs Package

Kernel Updated 02 Oct 2025

Summary

14/11/2021

Disclosed on

N/A

Severity

No i

Fix available

Unrated

Severity

Not published

CVSS Score

GSD-2021-1002023: isofs: Fix out of bound access for corrupted isofs image. Affects Kernel versions < 6e80e9314f8bb52d9eabe1907698718ff01120f5. No fix is published. How to fix ↓

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Background

The isofs package is a component of the Linux Kernel, which is responsible for handling the ISO 9660 file system. ISO 9660 is a standard file system for optical disc media, commonly used for CDs and DVDs. The isofs package provides support for mounting and accessing ISO 9660 file systems in Linux. However, a vulnerability has been discovered in the isofs package that can lead to out-of-bound access when processing corrupted isofs images.

Vulnerability Detail

The vulnerability in the isofs package arises from a lack of proper bounds checking when handling corrupted isofs images. An attacker could exploit this vulnerability by crafting a malicious isofs image that triggers the out-of-bound access. This could potentially lead to a crash or arbitrary code execution, depending on the specific circumstances. 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 fixed in Linux Kernel version v5.4.159 by commit 6e80e9314f8bb52d9eabe1907698718ff01120f5. To fix the vulnerability, users should update their Linux Kernel to version v5.4.159 or later. It is recommended to regularly update the Linux Kernel to ensure the latest security patches are applied.

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Workaround

There is no specific workaround mentioned for this vulnerability. However, users can mitigate the risk by ensuring they only process trusted isofs images from reliable sources. Additionally, implementing proper security measures, such as network segmentation and access controls, can help minimize the potential impact of this vulnerability.

Conclusion

The isofs package in the Linux Kernel is vulnerable to out-of-bound access when processing corrupted isofs images. To mitigate this vulnerability, it is crucial to update the Linux Kernel to version v5.4.159 or later. Additionally, users should exercise caution when processing isofs images from untrusted sources. For further assistance or information on vulnerability remediation, please contact DevNack.com.

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