ACPI: custom_method: fix potential use-after-free issue in Kernel
Summary
GSD-2021-1000159: ACPI: custom_method: fix potential use-after-free issue. Affects Kernel versions >= 03d1571d9513369c17e6848476763ebbd10ec2cb, < 62dc2440ebb552aa0d7f635e1697e077d9d21203. No fix is published. How to fix ↓
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Background
The Kernel is a fundamental component of the Linux operating system that manages core system functions, including hardware communication and process management. It provides an interface between the hardware and software layers, allowing applications to interact with the underlying system resources. The ACPI (Advanced Configuration and Power Interface) subsystem within the Kernel handles power management and device configuration. One of the features of ACPI is custom_method, which allows users to define their own ACPI methods. However, a potential use-after-free issue has been identified in the custom_method implementation.
Vulnerability Detail
The vulnerability arises from a use-after-free issue in the ACPI custom_method implementation. This type of vulnerability occurs when a program continues to use a memory reference after it has been freed, leading to potential memory corruption or arbitrary code execution. An attacker could potentially exploit this vulnerability to execute malicious code or crash the system. The vulnerability was introduced in version v5.4 of the Linux Kernel and has been fixed in version v5.10.36.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As this vulnerability has been fixed in the latest version of the Linux Kernel, there is no specific workaround available. It is strongly advised to update to the patched version to mitigate the risk.
Conclusion
The ACPI custom_method vulnerability in the Linux Kernel poses a potential risk of arbitrary code execution or system crashes. It is crucial to update the Kernel to version v5.10.36 or later, which includes the necessary fix. Failure to apply the patch may leave systems vulnerable to exploitation. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The vulnerability could potentially allow an attacker to execute arbitrary code or crash the system.
You can use the Vulert Playground at Vulert Scanner to check if your system is affected by this vulnerability. Simply upload your package-lock.json file, and Vulert will analyze it for any open-source vulnerabilities, including this one.
At the time of this report, there are no known exploits for this vulnerability. However, it is crucial to apply the patch promptly to prevent potential exploitation.
No, only versions from v5.4 to v5.10.35 are affected. The vulnerability has been fixed in version v5.10.36 and later.
No, the recommended mitigation is to update the Linux Kernel to the latest version, as it includes the necessary patch to address the vulnerability.
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