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    <title>Most recent entries from all</title>
    <link>https://db.gcve.eu</link>
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    <lastBuildDate>Wed, 30 Sep 2026 23:10:00 +0000</lastBuildDate>
    <item>
      <title>CVE-2026-93172 — mm/mm_init: handle alloc_percpu failure in free_area_init_core_hotplug</title>
      <link>https://db.gcve.eu/vuln/cve-2026-93172</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;mm/mm_init: handle alloc_percpu failure in free_area_init_core_hotplug&lt;/p&gt;
&lt;p&gt;We miss a failed allocation check for pgdat-&amp;gt;per_cpu_nodestats, which
results in a NULL deref when we offset into the per-cpu area.&lt;/p&gt;
&lt;p&gt;Propagate -ENOMEM up the stack and leave per_cpu_nodestats pointing
at boot_nodestats so a later online can retry the allocation.&lt;/p&gt;
&lt;p&gt;hotadd_init_pgdat() returns NULL on failure, which __try_online_node()
already maps to -ENOMEM.&lt;/p&gt;
&lt;p&gt;On failure nothing needs to be unwound:
  - the node is never marked online
  - per_cpu_nodestats is left pointing at boot_nodestats
  - __add_memory_resource() cleans up pending memblock resources
  - later online attempts retry the per_cpu_nodestats allocation&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;mm/mm_init: handle alloc_percpu failure in free_area_init_core_hotplug&lt;/p&gt;
&lt;p&gt;We miss a failed allocation check for pgdat-&amp;gt;per_cpu_nodestats, which
results in a NULL deref when we offset into the per-cpu area.&lt;/p&gt;
&lt;p&gt;Propagate -ENOMEM up the stack and leave per_cpu_nodestats pointing
at boot_nodestats so a later online can retry the allocation.&lt;/p&gt;
&lt;p&gt;hotadd_init_pgdat() returns NULL on failure, which __try_online_node()
already maps to -ENOMEM.&lt;/p&gt;
&lt;p&gt;On failure nothing needs to be unwound:
  - the node is never marked online
  - per_cpu_nodestats is left pointing at boot_nodestats
  - __add_memory_resource() cleans up pending memblock resources
  - later online attempts retry the per_cpu_nodestats allocation&lt;/p&gt;</content:encoded>
      <guid isPermaLink="false">https://db.gcve.eu/vuln/cve-2026-93172</guid>
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