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    <lastBuildDate>Wed, 07 Oct 2026 21:19:09 +0000</lastBuildDate>
    <item>
      <title>CVE-2022-50766 — btrfs: set generation before calling btrfs_clean_tree_block in btrfs_init_new_buffer</title>
      <link>https://cve.radiocsirt.org/vuln/cve-2022-50766</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: set generation before calling btrfs_clean_tree_block in btrfs_init_new_buffer&lt;/p&gt;
&lt;p&gt;syzbot is reporting uninit-value in btrfs_clean_tree_block() [1], for
commit bc877d285ca3dba2 (&amp;#34;btrfs: Deduplicate extent_buffer init code&amp;#34;)
missed that btrfs_set_header_generation() in btrfs_init_new_buffer() must
not be moved to after clean_tree_block() because clean_tree_block() is
calling btrfs_header_generation() since commit 55c69072d6bd5be1 (&amp;#34;Btrfs:
Fix extent_buffer usage when nodesize != leafsize&amp;#34;).&lt;/p&gt;
&lt;p&gt;Since memzero_extent_buffer() will reset &amp;#34;struct btrfs_header&amp;#34; part, we
can&amp;#39;t move btrfs_set_header_generation() to before memzero_extent_buffer().
Just re-add btrfs_set_header_generation() before btrfs_clean_tree_block().&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: set generation before calling btrfs_clean_tree_block in btrfs_init_new_buffer&lt;/p&gt;
&lt;p&gt;syzbot is reporting uninit-value in btrfs_clean_tree_block() [1], for
commit bc877d285ca3dba2 (&amp;#34;btrfs: Deduplicate extent_buffer init code&amp;#34;)
missed that btrfs_set_header_generation() in btrfs_init_new_buffer() must
not be moved to after clean_tree_block() because clean_tree_block() is
calling btrfs_header_generation() since commit 55c69072d6bd5be1 (&amp;#34;Btrfs:
Fix extent_buffer usage when nodesize != leafsize&amp;#34;).&lt;/p&gt;
&lt;p&gt;Since memzero_extent_buffer() will reset &amp;#34;struct btrfs_header&amp;#34; part, we
can&amp;#39;t move btrfs_set_header_generation() to before memzero_extent_buffer().
Just re-add btrfs_set_header_generation() before btrfs_clean_tree_block().&lt;/p&gt;</content:encoded>
      <guid isPermaLink="false">https://cve.radiocsirt.org/vuln/cve-2022-50766</guid>
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