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    <lastBuildDate>Wed, 30 Sep 2026 03:44:41 +0000</lastBuildDate>
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      <title>CVE-2023-34321 — arm32: The cache may not be properly cleaned/invalidated</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2023-34321</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Xen&lt;/p&gt;
&lt;p&gt;Arm provides multiple helpers to clean &amp;amp; invalidate the cache
for a given region.  This is, for instance, used when allocating
guest memory to ensure any writes (such as the ones during scrubbing)
have reached memory before handing over the page to a guest.&lt;/p&gt;
&lt;p&gt;Unfortunately, the arithmetics in the helpers can overflow and would
then result to skip the cache cleaning/invalidation.  Therefore there
is no guarantee when all the writes will reach the memory.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Xen&lt;/p&gt;
&lt;p&gt;Arm provides multiple helpers to clean &amp;amp; invalidate the cache
for a given region.  This is, for instance, used when allocating
guest memory to ensure any writes (such as the ones during scrubbing)
have reached memory before handing over the page to a guest.&lt;/p&gt;
&lt;p&gt;Unfortunately, the arithmetics in the helpers can overflow and would
then result to skip the cache cleaning/invalidation.  Therefore there
is no guarantee when all the writes will reach the memory.&lt;/p&gt;</content:encoded>
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