CVE-2024-56581

Summary

CVE-2024-56581 is a vulnerability in the Linux kernel's btrfs file system. It involves a use-after-free issue in the btrfs_ref_tree_mod() function. When an unexpected ref action occurs, the function errors out and frees the ref entry without removing it from the block entry's rbtree. Subsequently, when freeing the block entry, a use-after-free condition arises, as the rbtree still points to the freed block entry. This vulnerability can lead to memory corruption and potential system instability. These stack traces illustrate the issue during btrfs file system operations.

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