CVE-2024-41078

MEDIUM
Published Jul 29, 2024 Modified Nov 3, 2025 CWE-401

Description

In the Linux kernel, the following vulnerability has been resolved: btrfs: qgroup: fix quota root leak after quota disable failure If during the quota disable we fail when cleaning the quota tree or when deleting the root from the root tree, we jump to the 'out' label without ever dropping the reference on the quota root, resulting in a leak of the root since fs_info->quota_root is no longer pointing to the root (we have set it to NULL just before those steps). Fix this by always doing a btrfs_put_root() call under the 'out' label. This is a problem that exists since qgroups were first added in 2012 by commit bed92eae26cc ("Btrfs: qgroup implementation and prototypes"), but back then we missed a kfree on the quota root and free_extent_buffer() calls on its root and commit root nodes, since back then roots were not yet reference counted.

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CVSS v3.1 Score

5.5
MEDIUM
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness Type (CWE)

CWE-401 CWE-401

Affected Products

Vendor Product
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel

References

Advisories & Patches

https://git.kernel.org/stable/c/5ef3961682e5310f2221bae99bcf9f5d0f4b0d51 https://git.kernel.org/stable/c/7dd6a5b96157a21245566b21fd58276a214357ff https://git.kernel.org/stable/c/8a69529f22590b67bb018de9acbcf94abc8603cf https://git.kernel.org/stable/c/94818bdb00ef34a996a06aa63d11f591074cb757 https://git.kernel.org/stable/c/a7e4c6a3031c74078dba7fa36239d0f4fe476c53 https://git.kernel.org/stable/c/f88aeff5a173e8ba3133314eb4b964236ef3589d https://git.kernel.org/stable/c/5ef3961682e5310f2221bae99bcf9f5d0f4b0d51 https://git.kernel.org/stable/c/7dd6a5b96157a21245566b21fd58276a214357ff https://git.kernel.org/stable/c/8a69529f22590b67bb018de9acbcf94abc8603cf https://git.kernel.org/stable/c/94818bdb00ef34a996a06aa63d11f591074cb757 https://git.kernel.org/stable/c/a7e4c6a3031c74078dba7fa36239d0f4fe476c53 https://git.kernel.org/stable/c/f88aeff5a173e8ba3133314eb4b964236ef3589d

Frequently Asked Questions

What is CVE-2024-41078? +
In the Linux kernel, the following vulnerability has been resolved: btrfs: qgroup: fix quota root leak after quota disable failure If during the quota disable we fail when cleaning the quota tree or when deleting the root from the root tree, we jump to the 'out' label without ever dropping the reference on the quota root, resulting in a leak of the root since fs_info->quota_root is no longer pointing to the root (we have set it to NULL just before those steps). Fix this by always doing a btrfs_put_root() call under the 'out' label. This is a problem that exists since qgroups were first added in 2012 by commit bed92eae26cc ("Btrfs: qgroup implementation and prototypes"), but back then we missed a kfree on the quota root and free_extent_buffer() calls on its root and commit root nodes, since back then roots were not yet reference counted. It has a CVSS v3.1 base score of 5.5 (MEDIUM).
How severe is CVE-2024-41078? +
CVE-2024-41078 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.
What products are affected by CVE-2024-41078? +
CVE-2024-41078 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2024-41078? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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