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    <link>https://db.gcve.eu</link>
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    <lastBuildDate>Mon, 09 Nov 2026 18:09:34 +0000</lastBuildDate>
    <item>
      <title>CVE-2026-98469 — KVM: arm64: Fix AArch32 DBGBXVR&lt;n&gt; handling</title>
      <link>https://db.gcve.eu/vuln/cve-2026-98469</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;KVM: arm64: Fix AArch32 DBGBXVR&amp;lt;n&amp;gt; handling&lt;/p&gt;
&lt;p&gt;The consolidation of the breakpoint and watchpoint register accessors
switched DBGBXVR&amp;lt;n&amp;gt; from trap_bvr() to trap_dbg_wb_reg(). The latter
selects backing storage with demux_wb_reg(), which only handles Op2 values
4 through 7. Since DBGBXVR&amp;lt;n&amp;gt; uses Op2 1, an AArch32 guest access hits
KVM_BUG_ON() and marks the VM dead.&lt;/p&gt;
&lt;p&gt;DBGBXVR&amp;lt;n&amp;gt; aliases DBGBVR&amp;lt;n&amp;gt;_EL1[63:32], and its AA32(HI) descriptor
already selects the upper half. Map Op2 1 to dbg_bvr[] alongside Op2 4,
restoring the pre-regression behavior.&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;KVM: arm64: Fix AArch32 DBGBXVR&amp;lt;n&amp;gt; handling&lt;/p&gt;
&lt;p&gt;The consolidation of the breakpoint and watchpoint register accessors
switched DBGBXVR&amp;lt;n&amp;gt; from trap_bvr() to trap_dbg_wb_reg(). The latter
selects backing storage with demux_wb_reg(), which only handles Op2 values
4 through 7. Since DBGBXVR&amp;lt;n&amp;gt; uses Op2 1, an AArch32 guest access hits
KVM_BUG_ON() and marks the VM dead.&lt;/p&gt;
&lt;p&gt;DBGBXVR&amp;lt;n&amp;gt; aliases DBGBVR&amp;lt;n&amp;gt;_EL1[63:32], and its AA32(HI) descriptor
already selects the upper half. Map Op2 1 to dbg_bvr[] alongside Op2 4,
restoring the pre-regression behavior.&lt;/p&gt;</content:encoded>
      <guid isPermaLink="false">https://db.gcve.eu/vuln/cve-2026-98469</guid>
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