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    <lastBuildDate>Fri, 02 Oct 2026 15:45:02 +0000</lastBuildDate>
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      <title>CVE-2022-49762 — ntfs: check overflow when iterating ATTR_RECORDs</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2022-49762</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;ntfs: check overflow when iterating ATTR_RECORDs&lt;/p&gt;
&lt;p&gt;Kernel iterates over ATTR_RECORDs in mft record in ntfs_attr_find(). 
Because the ATTR_RECORDs are next to each other, kernel can get the next
ATTR_RECORD from end address of current ATTR_RECORD, through current
ATTR_RECORD length field.&lt;/p&gt;
&lt;p&gt;The problem is that during iteration, when kernel calculates the end
address of current ATTR_RECORD, kernel may trigger an integer overflow bug
in executing `a = (ATTR_RECORD*)((u8*)a + le32_to_cpu(a-&amp;gt;length))`.  This
may wrap, leading to a forever iteration on 32bit systems.&lt;/p&gt;
&lt;p&gt;This patch solves it by adding some checks on calculating end address
of current ATTR_RECORD during iteration.&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;ntfs: check overflow when iterating ATTR_RECORDs&lt;/p&gt;
&lt;p&gt;Kernel iterates over ATTR_RECORDs in mft record in ntfs_attr_find(). 
Because the ATTR_RECORDs are next to each other, kernel can get the next
ATTR_RECORD from end address of current ATTR_RECORD, through current
ATTR_RECORD length field.&lt;/p&gt;
&lt;p&gt;The problem is that during iteration, when kernel calculates the end
address of current ATTR_RECORD, kernel may trigger an integer overflow bug
in executing `a = (ATTR_RECORD*)((u8*)a + le32_to_cpu(a-&amp;gt;length))`.  This
may wrap, leading to a forever iteration on 32bit systems.&lt;/p&gt;
&lt;p&gt;This patch solves it by adding some checks on calculating end address
of current ATTR_RECORD during iteration.&lt;/p&gt;</content:encoded>
      <guid isPermaLink="false">https://vulnerability.circl.lu/vuln/cve-2022-49762</guid>
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