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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 11:35:41 +0000</lastBuildDate>
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      <title>CVE-2026-89509 — RDMA/ionic: Embed counter driver data in rdma_counter allocation</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2026-89509</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;RDMA/ionic: Embed counter driver data in rdma_counter allocation&lt;/p&gt;
&lt;p&gt;Commit 7e53b31acc7f (&amp;#34;RDMA/core: Create and destroy rdma_counter using
rdma_zalloc_drv_obj()&amp;#34;) requires drivers implementing counter ops to
embed struct rdma_counter in a driver-specific struct, register its size
via INIT_RDMA_OBJ_SIZE, and provide a counter_init callback.&lt;/p&gt;
&lt;p&gt;The ionic driver was merged without this adaptation, causing a NULL
pointer dereference in alloc_and_bind() since rdma_zalloc_drv_obj()
allocates zero bytes when size_rdma_counter is unset.&lt;/p&gt;
&lt;p&gt;Consolidate struct ionic_counter into a new struct ionic_rdma_counter
that embeds struct rdma_counter, replace the xarray with a lightweight
ida for ID allocation, and add the required counter_init and
INIT_RDMA_OBJ_SIZE declarations.&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;RDMA/ionic: Embed counter driver data in rdma_counter allocation&lt;/p&gt;
&lt;p&gt;Commit 7e53b31acc7f (&amp;#34;RDMA/core: Create and destroy rdma_counter using
rdma_zalloc_drv_obj()&amp;#34;) requires drivers implementing counter ops to
embed struct rdma_counter in a driver-specific struct, register its size
via INIT_RDMA_OBJ_SIZE, and provide a counter_init callback.&lt;/p&gt;
&lt;p&gt;The ionic driver was merged without this adaptation, causing a NULL
pointer dereference in alloc_and_bind() since rdma_zalloc_drv_obj()
allocates zero bytes when size_rdma_counter is unset.&lt;/p&gt;
&lt;p&gt;Consolidate struct ionic_counter into a new struct ionic_rdma_counter
that embeds struct rdma_counter, replace the xarray with a lightweight
ida for ID allocation, and add the required counter_init and
INIT_RDMA_OBJ_SIZE declarations.&lt;/p&gt;</content:encoded>
      <guid isPermaLink="false">https://vulnerability.circl.lu/vuln/cve-2026-89509</guid>
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