CVE-2024-44963

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description The issue is related to the btrfs file system in the Linux kernel. When freeing a tree block, the function btrfs free tree block() does not handle errors properly, leading to a BUG ON() condition. The error most likely to occur is -ENOMEM, but other errors can also happen, especially when qgroups are enabled. The function btrfs qgroup trace extent post() can return errors like -EUCLEAN or other values from btrfs search slot(), which can be propagated back to btrfs free tree block(). To fix this, the kernel now returns the error to the callers and aborts the transaction to prevent space leaks. This issue was triggered by Syzbot, likely due to memory allocation failure injection.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.