Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: btrfs: do not BUG_ON() when freeing tree block after error When freeing a tree block, at btrfs_free_tree_block(), if we fail to create a delayed reference we don't deal with the error and just do a BUG_ON(). The error most likely to happen is -ENOMEM, and we have a comment mentioning that only -ENOMEM can happen, but that is not true, because in case qgroups are enabled any error returned from btrfs_qgroup_trace_extent_post() (can be -EUCLEAN or anything returned from btrfs_search_slot() for example) can be propagated back to btrfs_free_tree_block(). So stop doing a BUG_ON() and return the error to the callers and make them abort the transaction to prevent leaking space. Syzbot was triggering this, likely due to memory allocation failure injection.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | < 6.10.5 |
References
- https://git.kernel.org/stable/c/22d907bcd283d69d5e60497fc0d51969545c583b
- https://git.kernel.org/stable/c/98251cd60b4d702a8a81de442ab621e83a3fb24fPatch
- https://git.kernel.org/stable/c/bb3868033a4cccff7be57e9145f2117cbdc91c11Patch
FAQ
What is CVE-2024-44963?
CVE-2024-44963 is a vulnerability with a CVSS score of 5.5 (MEDIUM). In the Linux kernel, the following vulnerability has been resolved: btrfs: do not BUG_ON() when freeing tree block after error When freeing a tree block, at btrfs_free_tree_block(), if we fail to cr...
How severe is CVE-2024-44963?
CVE-2024-44963 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2024-44963?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.