Double-Free Vulnerability in regmap Package
Summary
UVI-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 component of the Linux Kernel, which is responsible for managing register maps for various hardware devices. It provides an abstraction layer for accessing and manipulating device registers. The regcache_rbtree_exit() function within the regmap package is susceptible to a double-free vulnerability.
Vulnerability Detail
The double-free vulnerability in regcache_rbtree_exit() can be exploited by an attacker to cause a denial-of-service (DoS) condition or potentially execute arbitrary code. This vulnerability occurs when the function attempts to free a memory region that has already been freed, leading to memory corruption and potential system instability. The impact and attack plausibility of this vulnerability have not been proven.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no specific workaround available for this vulnerability. It is essential to update the Linux Kernel to the recommended version to mitigate the risk.
Conclusion
The double-free vulnerability in the regmap package can be mitigated by updating the Linux Kernel to version v5.10.77 or later. It is crucial to promptly apply the recommended fix to ensure the security and stability of the system. For further support on 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.
The vulnerability can lead to a denial-of-service condition or potential execution of arbitrary code.
Updating the Linux Kernel to version v5.10.77 or later will fix this vulnerability.
No, updating the kernel is the recommended solution.
You can refer to the source link provided in the database_specific section of the vulnerability details.
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