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    <title>Most recent entries from all</title>
    <link>https://vulnerability.circl.lu</link>
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    <lastBuildDate>Fri, 02 Oct 2026 15:09:19 +0000</lastBuildDate>
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      <title>CVE-2024-35985 — sched/eevdf: Prevent vlag from going out of bounds in reweight_eevdf()</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2024-35985</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;sched/eevdf: Prevent vlag from going out of bounds in reweight_eevdf()&lt;/p&gt;
&lt;p&gt;It was possible to have pick_eevdf() return NULL, which then causes a
NULL-deref. This turned out to be due to entity_eligible() returning
falsely negative because of a s64 multiplcation overflow.&lt;/p&gt;
&lt;p&gt;Specifically, reweight_eevdf() computes the vlag without considering
the limit placed upon vlag as update_entity_lag() does, and then the
scaling multiplication (remember that weight is 20bit fixed point) can
overflow. This then leads to the new vruntime being weird which then
causes the above entity_eligible() to go side-ways and claim nothing
is eligible.&lt;/p&gt;
&lt;p&gt;Thus limit the range of vlag accordingly.&lt;/p&gt;
&lt;p&gt;All this was quite rare, but fatal when it does happen.&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;sched/eevdf: Prevent vlag from going out of bounds in reweight_eevdf()&lt;/p&gt;
&lt;p&gt;It was possible to have pick_eevdf() return NULL, which then causes a
NULL-deref. This turned out to be due to entity_eligible() returning
falsely negative because of a s64 multiplcation overflow.&lt;/p&gt;
&lt;p&gt;Specifically, reweight_eevdf() computes the vlag without considering
the limit placed upon vlag as update_entity_lag() does, and then the
scaling multiplication (remember that weight is 20bit fixed point) can
overflow. This then leads to the new vruntime being weird which then
causes the above entity_eligible() to go side-ways and claim nothing
is eligible.&lt;/p&gt;
&lt;p&gt;Thus limit the range of vlag accordingly.&lt;/p&gt;
&lt;p&gt;All this was quite rare, but fatal when it does happen.&lt;/p&gt;</content:encoded>
      <guid isPermaLink="false">https://vulnerability.circl.lu/vuln/cve-2024-35985</guid>
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