Use-after-free vulnerability in atm: nicstar

Kernel Updated 02 Oct 2025

Summary

03/08/2021

Disclosed on

N/A

Severity

No i

Fix available

Unrated

Severity

Not published

CVSS Score

GSD-2021-1001357: atm: nicstar: Fix possible use-after-free in nicstar_cleanup(). Affects Kernel versions < bdf5334250c69fabf555b7322c75249ea7d5f148. No fix is published. How to fix ↓

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Background

The atm: nicstar package is a component of the Linux Kernel, which is responsible for handling Asynchronous Transfer Mode (ATM) network interfaces. It provides the necessary drivers and functionality for ATM network cards. The nicstar_cleanup() function within the package is susceptible to a use-after-free vulnerability.

Vulnerability Detail

The use-after-free vulnerability in atm: nicstar arises from improper memory management in the nicstar_cleanup() function. This vulnerability could be exploited by an attacker to execute arbitrary code or cause a denial-of-service condition. The vulnerability has been fixed in Linux Kernel version v5.4.133 by commit bdf5334250c69fabf555b7322c75249ea7d5f148.

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 v5.4.133 or later. This can be done by pulling the latest updates from the official Linux Kernel repository and rebuilding the kernel. Alternatively, users can wait for their Linux distribution to provide an updated package that includes the fix.

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Workaround

There is no known workaround for this vulnerability. It is essential to apply the fix by updating the Linux Kernel.

Conclusion

The use-after-free vulnerability in atm: nicstar has been identified and fixed in Linux Kernel version v5.4.133. It is crucial to update the Linux Kernel to protect systems from potential exploitation. For further support on vulnerability remediation, please contact DevNack.com.

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