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    <title>Most recent entries from all</title>
    <link>https://vulnerability.circl.lu</link>
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    <lastBuildDate>Fri, 02 Oct 2026 00:44:53 +0000</lastBuildDate>
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      <title>CVE-2025-21879 — btrfs: fix use-after-free on inode when scanning root during em shrinking</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2025-21879</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: fix use-after-free on inode when scanning root during em shrinking&lt;/p&gt;
&lt;p&gt;At btrfs_scan_root() we are accessing the inode&amp;#39;s root (and fs_info) in a
call to btrfs_fs_closing() after we have scheduled the inode for a delayed
iput, and that can result in a use-after-free on the inode in case the
cleaner kthread does the iput before we dereference the inode in the call
to btrfs_fs_closing().&lt;/p&gt;
&lt;p&gt;Fix this by using the fs_info stored already in a local variable instead
of doing inode-&amp;gt;root-&amp;gt;fs_info.&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: fix use-after-free on inode when scanning root during em shrinking&lt;/p&gt;
&lt;p&gt;At btrfs_scan_root() we are accessing the inode&amp;#39;s root (and fs_info) in a
call to btrfs_fs_closing() after we have scheduled the inode for a delayed
iput, and that can result in a use-after-free on the inode in case the
cleaner kthread does the iput before we dereference the inode in the call
to btrfs_fs_closing().&lt;/p&gt;
&lt;p&gt;Fix this by using the fs_info stored already in a local variable instead
of doing inode-&amp;gt;root-&amp;gt;fs_info.&lt;/p&gt;</content:encoded>
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