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    <title>Most recent entries from all</title>
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    <lastBuildDate>Wed, 07 Oct 2026 11:03:30 +0000</lastBuildDate>
    <item>
      <title>CVE-2024-41078 — btrfs: qgroup: fix quota root leak after quota disable failure</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2024-41078</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Linux&lt;/p&gt;
&lt;p&gt;In the Linux kernel, the following vulnerability has been resolved:&lt;/p&gt;
&lt;p&gt;btrfs: qgroup: fix quota root leak after quota disable failure&lt;/p&gt;
&lt;p&gt;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 &amp;#39;out&amp;#39; label without
ever dropping the reference on the quota root, resulting in a leak of the
root since fs_info-&amp;gt;quota_root is no longer pointing to the root (we have
set it to NULL just before those steps).&lt;/p&gt;
&lt;p&gt;Fix this by always doing a btrfs_put_root() call under the &amp;#39;out&amp;#39; label.
This is a problem that exists since qgroups were first added in 2012 by
commit bed92eae26cc (&amp;#34;Btrfs: qgroup implementation and prototypes&amp;#34;), 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.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Linux&lt;/p&gt;
&lt;p&gt;In the Linux kernel, the following vulnerability has been resolved:&lt;/p&gt;
&lt;p&gt;btrfs: qgroup: fix quota root leak after quota disable failure&lt;/p&gt;
&lt;p&gt;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 &amp;#39;out&amp;#39; label without
ever dropping the reference on the quota root, resulting in a leak of the
root since fs_info-&amp;gt;quota_root is no longer pointing to the root (we have
set it to NULL just before those steps).&lt;/p&gt;
&lt;p&gt;Fix this by always doing a btrfs_put_root() call under the &amp;#39;out&amp;#39; label.
This is a problem that exists since qgroups were first added in 2012 by
commit bed92eae26cc (&amp;#34;Btrfs: qgroup implementation and prototypes&amp;#34;), 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.&lt;/p&gt;</content:encoded>
      <guid isPermaLink="false">https://vulnerability.circl.lu/vuln/cve-2024-41078</guid>
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