CVE-2024-41078: Linux kernel · btrfs: qgroup: fix quota root leak after quota disable failure
Affects Linux kernelSource GCVE Database
Not known to be exploited · CVSS 5.5 Medium · fixed in 5.15.0-1072.78~20.04.1 : update Linux kernel when convenient.
Data as of 26 Oct 2026, 23:28 UTC
- Patch
- Available – fixed in 5.15.0-1072.78~20.04.1, 5.15.0-1078.87~20.04.1, 5.15.0-1071.79~20.04.1 +54
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HExploitation evidence
Disclosed: evidence found.
CVE published 29 Jul 2024
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Patches and advisories
- ubuntu.com/security/notices/USN-7089-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7090-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7089-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-7089-3 (opens in a new tab)
- ubuntu.com/security/notices/USN-7095-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7100-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7100-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-7089-4 (opens in a new tab)
- ubuntu.com/security/notices/USN-7089-5 (opens in a new tab)
- ubuntu.com/security/notices/USN-7089-6 (opens in a new tab)
- ubuntu.com/security/notices/USN-7089-7 (opens in a new tab)
- ubuntu.com/security/notices/USN-7123-1 (opens in a new tab)
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 24.04 LTSlinuxpkg:deb/ubuntu/linux?arch=source&distro=nobleOther threats | Affected
| Fixed in
|
Ubuntu 24.04 LTSlinux-awspkg:deb/ubuntu/linux-aws?arch=source&distro=nobleOther threats | Affected
| Fixed in
|
Ubuntu 24.04 LTSlinux-azurepkg:deb/ubuntu/linux-azure?arch=source&distro=nobleOther threats | Affected
| Fixed in
|
Ubuntu 24.04 LTSlinux-gcppkg:deb/ubuntu/linux-gcp?arch=source&distro=nobleOther threats | Affected
| Fixed in
|
Ubuntu 24.04 LTSlinux-gkepkg:deb/ubuntu/linux-gke?arch=source&distro=nobleOther threats | Affected
| Fixed in
|
Ubuntu 24.04 LTSlinux-gkeoppkg:deb/ubuntu/linux-gkeop?arch=source&distro=nobleOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
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.
References
- ubuntu.com/security/CVE-2024-41078 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2024-41078 (opens in a new tab)
- git.kernel.org/linus/a7e4c6a3031c74078dba7fa36239d0f4fe476c53 (opens in a new tab)
- git.kernel.org/stable/c/94818bdb00ef34a996a06aa63d11f591074cb757 (opens in a new tab)
- git.kernel.org/stable/c/8a69529f22590b67bb018de9acbcf94abc8603cf (opens in a new tab)
- git.kernel.org/stable/c/5ef3961682e5310f2221bae99bcf9f5d0f4b0d51 (opens in a new tab)
- git.kernel.org/stable/c/f88aeff5a173e8ba3133314eb4b964236ef3589d (opens in a new tab)
- git.kernel.org/stable/c/7dd6a5b96157a21245566b21fd58276a214357ff (opens in a new tab)
- git.kernel.org/stable/c/a7e4c6a3031c74078dba7fa36239d0f4fe476c53 (opens in a new tab)
- ubuntu.com/security/notices/USN-7089-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7090-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7089-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-7089-3 (opens in a new tab)
- ubuntu.com/security/notices/USN-7095-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7100-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7100-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-7089-4 (opens in a new tab)
- ubuntu.com/security/notices/USN-7089-5 (opens in a new tab)
- ubuntu.com/security/notices/USN-7089-6 (opens in a new tab)
- ubuntu.com/security/notices/USN-7089-7 (opens in a new tab)