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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 11:08:13 +0000</lastBuildDate>
    <item>
      <title>CVE-2025-38177 — sch_hfsc: make hfsc_qlen_notify() idempotent</title>
      <link>https://db.gcve.eu/vuln/cve-2025-38177</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;sch_hfsc: make hfsc_qlen_notify() idempotent&lt;/p&gt;
&lt;p&gt;hfsc_qlen_notify() is not idempotent either and not friendly
to its callers, like fq_codel_dequeue(). Let&amp;#39;s make it idempotent
to ease qdisc_tree_reduce_backlog() callers&amp;#39; life:&lt;/p&gt;
&lt;p&gt;1. update_vf() decreases cl-&amp;gt;cl_nactive, so we can check whether it is
non-zero before calling it.&lt;/p&gt;
&lt;p&gt;2. eltree_remove() always removes RB node cl-&amp;gt;el_node, but we can use
   RB_EMPTY_NODE() + RB_CLEAR_NODE() to make it safe.&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;sch_hfsc: make hfsc_qlen_notify() idempotent&lt;/p&gt;
&lt;p&gt;hfsc_qlen_notify() is not idempotent either and not friendly
to its callers, like fq_codel_dequeue(). Let&amp;#39;s make it idempotent
to ease qdisc_tree_reduce_backlog() callers&amp;#39; life:&lt;/p&gt;
&lt;p&gt;1. update_vf() decreases cl-&amp;gt;cl_nactive, so we can check whether it is
non-zero before calling it.&lt;/p&gt;
&lt;p&gt;2. eltree_remove() always removes RB node cl-&amp;gt;el_node, but we can use
   RB_EMPTY_NODE() + RB_CLEAR_NODE() to make it safe.&lt;/p&gt;</content:encoded>
      <guid isPermaLink="false">https://db.gcve.eu/vuln/cve-2025-38177</guid>
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