CVE-2024-56582

Summary

CVE-2024-56582 is a use-after-free vulnerability discovered in the btrfs file system of the Linux kernel. The issue was identified by Shinichiro in the CI system during fstests' btrfs/284 tests on a TCMU runner device. The vulnerability arises from a memory management problem in the btrfs_encoded_read_endio() function. The memory allocated by task 3661 is freed, but later accessed by another task, leading to a use-after-free condition. As a result, a kernel oops occurs, potentially leading to system instability or crashes. The vulnerability affects Linux kernel versions prior to the patch, and users are advised to apply the necessary update to mitigate the risk.

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