Double-Free Vulnerability in regmap Package
Summary
GSD-2021-1002136: regmap: Fix possible double-free in regcache_rbtree_exit(). Affects Kernel versions >= 3f4ff561bc88b074d5e868dde4012d89cbb06c87, < 50cc1462a668dc62949a1127388bc3af785ce047. No fix is published. How to fix ↓
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Background
The regmap package is a component of the Linux Kernel ecosystem. It provides a framework for accessing and manipulating hardware registers in a device-independent manner. The package is responsible for managing register caches and facilitating communication between the kernel and hardware devices. It is widely used in various Linux-based systems and plays a crucial role in device driver development and hardware interaction.
Vulnerability Detail
The identified vulnerability, with ID GSD-2021-1002136, is a possible double-free issue in the regcache_rbtree_exit() function of the regmap package. A double-free vulnerability occurs when a program attempts to free the same memory location more than once, leading to memory corruption and potential exploitation by attackers. The impact and attack plausibility of this vulnerability have not been proven yet, but it poses a potential security risk. The vulnerability was introduced in version v3.12 of the Linux Kernel and has been fixed in version v5.14.16 by commit 50cc1462a668dc62949a1127388bc3af785ce047.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
No specific workaround has been provided for this vulnerability. It is recommended to follow the steps mentioned in the 'how_to_fix' section to address the issue.
Conclusion
The double-free vulnerability in the regmap package can potentially lead to memory corruption and exploitation. It is crucial to update the Linux Kernel to version v5.14.16 or later to mitigate this vulnerability. Additionally, reviewing and updating any device drivers or software components that rely on the regmap package is recommended. For further support and assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
The regmap package is a component of the Linux Kernel ecosystem that provides a framework for accessing and manipulating hardware registers in a device-independent manner.
A double-free vulnerability occurs when a program attempts to free the same memory location more than once, leading to memory corruption and potential exploitation by attackers.
The impact of this vulnerability is currently unknown. While it has the potential to be exploited by attackers, the actual impact and attack plausibility have not been proven.
To fix this vulnerability, it is recommended to update the Linux Kernel to version v5.14.16 or later. Detailed steps are provided in the 'how_to_fix' section.
No specific workaround has been provided for this vulnerability. It is recommended to follow the steps mentioned in the 'how_to_fix' section to address the issue.
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