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CVE-2024-44963

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…

Published Sep 4, 2024EPSS 0.24%

Overview

CVE-2024-44963 is a medium-severity vulnerability. It was published on September 4, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/22d907bcd283d69d5e60497fc0d51969545c583bRefgit.kernel.org/stable/c/98251cd60b4d702a8a81de442ab621e83a3fb24fRefgit.kernel.org/stable/c/bb3868033a4cccff7be57e9145f2117cbdc91c11

How CyberStrike helps

Frequently asked questions

What is CVE-2024-44963?

CVE-2024-44963 is a medium-severity vulnerability. It was published on September 4, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-44963?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2024-44963?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2024-44963?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-44963 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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