User After Free Vulnerability in Linux Kernel's HugeTLB Management

CVE-2022-50630

What is CVE-2022-50630?

A vulnerability in the Linux kernel's handling of HugeTLB can lead to a User After Free (UAF) condition due to improper locking mechanisms in the memory management code. Specifically, during userfault handling, the necessary locks are unlocked before processing the userfault, allowing for potential race conditions that may affect the integrity of memory access and lead to unpredictable behavior. This issue underscores the importance of precise locking sequences in memory management operations within the kernel.

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