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    <link>https://cve.radiocsirt.org</link>
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    <lastBuildDate>Tue, 06 Oct 2026 23:19:39 +0000</lastBuildDate>
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      <title>CVE-2025-37905 — firmware: arm_scmi: Balance device refcount when destroying devices</title>
      <link>https://cve.radiocsirt.org/vuln/cve-2025-37905</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;firmware: arm_scmi: Balance device refcount when destroying devices&lt;/p&gt;
&lt;p&gt;Using device_find_child() to lookup the proper SCMI device to destroy
causes an unbalance in device refcount, since device_find_child() calls an
implicit get_device(): this, in turns, inhibits the call of the provided
release methods upon devices destruction.&lt;/p&gt;
&lt;p&gt;As a consequence, one of the structures that is not freed properly upon
destruction is the internal struct device_private dev-&amp;gt;p populated by the
drivers subsystem core.&lt;/p&gt;
&lt;p&gt;KMemleak detects this situation since loading/unloding some SCMI driver
causes related devices to be created/destroyed without calling any
device_release method.&lt;/p&gt;
&lt;p&gt;unreferenced object 0xffff00000f583800 (size 512):
  comm &amp;#34;insmod&amp;#34;, pid 227, jiffies 4294912190
  hex dump (first 32 bytes):
    00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00  .....N..........
    ff ff ff ff ff ff ff ff 60 36 1d 8a 00 80 ff ff  ........`6......
  backtrace (crc 114e2eed):
    kmemleak_alloc+0xbc/0xd8
    __kmalloc_cache_noprof+0x2dc/0x398
    device_add+0x954/0x12d0
    device_register+0x28/0x40
    __scmi_device_create.part.0+0x1bc/0x380
    scmi_device_create+0x2d0/0x390
    scmi_create_protocol_devices+0x74/0xf8
    scmi_device_request_notifier+0x1f8/0x2a8
    notifier_call_chain+0x110/0x3b0
    blocking_notifier_call_chain+0x70/0xb0
    scmi_driver_register+0x350/0x7f0
    0xffff80000a3b3038
    do_one_initcall+0x12c/0x730
    do_in…&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;firmware: arm_scmi: Balance device refcount when destroying devices&lt;/p&gt;
&lt;p&gt;Using device_find_child() to lookup the proper SCMI device to destroy
causes an unbalance in device refcount, since device_find_child() calls an
implicit get_device(): this, in turns, inhibits the call of the provided
release methods upon devices destruction.&lt;/p&gt;
&lt;p&gt;As a consequence, one of the structures that is not freed properly upon
destruction is the internal struct device_private dev-&amp;gt;p populated by the
drivers subsystem core.&lt;/p&gt;
&lt;p&gt;KMemleak detects this situation since loading/unloding some SCMI driver
causes related devices to be created/destroyed without calling any
device_release method.&lt;/p&gt;
&lt;p&gt;unreferenced object 0xffff00000f583800 (size 512):
  comm &amp;#34;insmod&amp;#34;, pid 227, jiffies 4294912190
  hex dump (first 32 bytes):
    00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00  .....N..........
    ff ff ff ff ff ff ff ff 60 36 1d 8a 00 80 ff ff  ........`6......
  backtrace (crc 114e2eed):
    kmemleak_alloc+0xbc/0xd8
    __kmalloc_cache_noprof+0x2dc/0x398
    device_add+0x954/0x12d0
    device_register+0x28/0x40
    __scmi_device_create.part.0+0x1bc/0x380
    scmi_device_create+0x2d0/0x390
    scmi_create_protocol_devices+0x74/0xf8
    scmi_device_request_notifier+0x1f8/0x2a8
    notifier_call_chain+0x110/0x3b0
    blocking_notifier_call_chain+0x70/0xb0
    scmi_driver_register+0x350/0x7f0
    0xffff80000a3b3038
    do_one_initcall+0x12c/0x730
    do_in…&lt;/p&gt;</content:encoded>
      <guid isPermaLink="false">https://cve.radiocsirt.org/vuln/cve-2025-37905</guid>
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