Double Free of cond_list in selinux Package

Kernel Updated 02 Oct 2025

Summary

18/02/2022

Disclosed on

N/A

Severity

No i

Fix available

Unrated

Severity

Not published

CVSS Score

GSD-2022-1000279: selinux: fix double free of cond_list on error paths. Affects Kernel versions < 70caa32e6d81f45f0702070c0e4dfe945e92fbd7. No fix is published. How to fix ↓

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Background

The selinux package is a security module for the Linux kernel that provides access control security policies. It is designed to enforce mandatory access control policies, restricting the actions that processes can perform on the system. The package uses a set of security rules and labels to determine the permissions granted to processes and files. However, a vulnerability has been discovered in the selinux package that could lead to a double free of the cond_list object, potentially resulting in a system crash or arbitrary code execution.

Vulnerability Detail

The vulnerability in the selinux package arises from a double free of the cond_list object on error paths. This can occur when certain error conditions are encountered during the execution of selinux functions. A double free vulnerability allows an attacker to free the same memory location twice, which can lead to memory corruption and potentially enable them to execute arbitrary code or crash the system. The impact of this vulnerability depends on the context in which the double free occurs and the attacker's ability to control the freed memory. It is important to note that the actual impact and attack plausibility have not yet been proven.

How To Fix

No fixed version is published for this vulnerability.

The vulnerability has been fixed in the Linux Kernel version v5.15.22 by commit 70caa32e6d81f45f0702070c0e4dfe945e92fbd7. To fix the vulnerability, users should update their Linux Kernel to the latest version available. This can be done by downloading the updated kernel source code from the official Linux Kernel repository (https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/) and compiling it according to the provided instructions.

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Workaround

No workaround has been provided for this vulnerability.

Conclusion

The selinux package is vulnerable to a double free of the cond_list object, which can potentially lead to system crashes or arbitrary code execution. It is recommended to update the Linux Kernel to the latest version to fix this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.

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