Double-Free Vulnerability in regmap Package
Summary
GSD-2021-1002068: regmap: Fix possible double-free in regcache_rbtree_exit(). Affects Kernel versions >= 3f4ff561bc88b074d5e868dde4012d89cbb06c87, < 36e911a16b377bde0ad91a8c679069d0d310b1a6. No fix is published. How to fix ↓
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Background
The regmap package is a part of the Linux Kernel ecosystem and is responsible for managing register maps for various hardware devices. It provides an abstraction layer for accessing and manipulating device registers. The vulnerability in question, identified as GSD-2021-1002068, affects the regmap package and can lead to a double-free condition in the regcache_rbtree_exit() function.
Vulnerability Detail
The double-free vulnerability in regcache_rbtree_exit() can be exploited by an attacker to potentially execute arbitrary code or cause a denial-of-service (DoS) condition. The vulnerability arises due to improper handling of memory deallocation, which can result in freeing the same memory region multiple times. This can lead to memory corruption and subsequent unpredictable behavior. The impact and attack plausibility of this vulnerability have not been proven yet.
How To Fix
No fixed version is published for this vulnerability.
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Conclusion
The double-free vulnerability in the regmap package of the Linux Kernel can potentially lead to arbitrary code execution or a denial-of-service condition. It is crucial to update the Linux Kernel to the fixed version or any subsequent version that includes the fix. For further support and assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
Regmap is a component of the Linux Kernel that manages register maps for hardware devices. It provides an abstraction layer for accessing and manipulating device registers, making it easier for drivers to interact with hardware.
A double-free vulnerability occurs when a program attempts to free the same memory region more than once. This can lead to memory corruption and unpredictable behavior, potentially allowing an attacker to execute arbitrary code or cause a denial-of-service (DoS) condition.
The double-free vulnerability in regmap can be exploited by an attacker to potentially execute arbitrary code or cause a DoS condition. By triggering the improper memory deallocation, an attacker can manipulate the memory state and exploit the resulting memory corruption to their advantage.
No, the impact and attack plausibility of this vulnerability have not been proven yet. However, it is still important to apply the fix to ensure the security and stability of the system.
You can find more information about this vulnerability, including its technical details and the fix, in the vulnerability report available at https://github.com/cloudsecurityalliance/gsd-database/blob/main/2021/1002xxx/GSD-2021-1002068.json
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