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    <title>Most recent entries from all</title>
    <link>https://vulnerability.circl.lu</link>
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    <lastBuildDate>Wed, 30 Sep 2026 03:37:18 +0000</lastBuildDate>
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      <title>CVE-2024-46794 — x86/tdx: Fix data leak in mmio_read()</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2024-46794</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;x86/tdx: Fix data leak in mmio_read()&lt;/p&gt;
&lt;p&gt;The mmio_read() function makes a TDVMCALL to retrieve MMIO data for an
address from the VMM.&lt;/p&gt;
&lt;p&gt;Sean noticed that mmio_read() unintentionally exposes the value of an
initialized variable (val) on the stack to the VMM.&lt;/p&gt;
&lt;p&gt;This variable is only needed as an output value. It did not need to be
passed to the VMM in the first place.&lt;/p&gt;
&lt;p&gt;Do not send the original value of *val to the VMM.&lt;/p&gt;
&lt;p&gt;[ dhansen: clarify what &amp;#39;val&amp;#39; is used for. ]&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;x86/tdx: Fix data leak in mmio_read()&lt;/p&gt;
&lt;p&gt;The mmio_read() function makes a TDVMCALL to retrieve MMIO data for an
address from the VMM.&lt;/p&gt;
&lt;p&gt;Sean noticed that mmio_read() unintentionally exposes the value of an
initialized variable (val) on the stack to the VMM.&lt;/p&gt;
&lt;p&gt;This variable is only needed as an output value. It did not need to be
passed to the VMM in the first place.&lt;/p&gt;
&lt;p&gt;Do not send the original value of *val to the VMM.&lt;/p&gt;
&lt;p&gt;[ dhansen: clarify what &amp;#39;val&amp;#39; is used for. ]&lt;/p&gt;</content:encoded>
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