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    <title>Most recent entries from all</title>
    <link>https://vulnerability.circl.lu</link>
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    <lastBuildDate>Tue, 29 Sep 2026 22:04:53 +0000</lastBuildDate>
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      <title>CVE-2026-43133 — KVM: nSVM: Always use vmcb01 in VMLOAD/VMSAVE emulation</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2026-43133</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Linux, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat OpenShift Container Platform 4&lt;/p&gt;
&lt;p&gt;In the Linux kernel, the following vulnerability has been resolved:&lt;/p&gt;
&lt;p&gt;KVM: nSVM: Always use vmcb01 in VMLOAD/VMSAVE emulation&lt;/p&gt;
&lt;p&gt;Commit cc3ed80ae69f (&amp;#34;KVM: nSVM: always use vmcb01 to for vmsave/vmload
of guest state&amp;#34;) made KVM always use vmcb01 for the fields controlled by
VMSAVE/VMLOAD, but it missed updating the VMLOAD/VMSAVE emulation code
to always use vmcb01.&lt;/p&gt;
&lt;p&gt;As a result, if VMSAVE/VMLOAD is executed by an L2 guest and is not
intercepted by L1, KVM will mistakenly use vmcb02. Always use vmcb01
instead of the current VMCB.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Linux, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat OpenShift Container Platform 4&lt;/p&gt;
&lt;p&gt;In the Linux kernel, the following vulnerability has been resolved:&lt;/p&gt;
&lt;p&gt;KVM: nSVM: Always use vmcb01 in VMLOAD/VMSAVE emulation&lt;/p&gt;
&lt;p&gt;Commit cc3ed80ae69f (&amp;#34;KVM: nSVM: always use vmcb01 to for vmsave/vmload
of guest state&amp;#34;) made KVM always use vmcb01 for the fields controlled by
VMSAVE/VMLOAD, but it missed updating the VMLOAD/VMSAVE emulation code
to always use vmcb01.&lt;/p&gt;
&lt;p&gt;As a result, if VMSAVE/VMLOAD is executed by an L2 guest and is not
intercepted by L1, KVM will mistakenly use vmcb02. Always use vmcb01
instead of the current VMCB.&lt;/p&gt;</content:encoded>
      <guid isPermaLink="false">https://vulnerability.circl.lu/vuln/cve-2026-43133</guid>
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