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    <lastBuildDate>Wed, 30 Sep 2026 00:11:55 +0000</lastBuildDate>
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      <title>CVE-2026-56116 — dhcpcd Memory Leak DoS via IPv6 Router Advertisement Handling</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2026-56116</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; NetworkConfiguration dhcpcd&lt;/p&gt;
&lt;p&gt;dhcpcd through 10.3.2, fixed in commit 708b4a5, contains a memory leak vulnerability in the IPv6 Router Advertisement route information handling that allows an unauthenticated same-link attacker to cause denial of service by sending crafted Router Advertisements. Attackers can repeatedly send Router Advertisements containing Route Information options with a lifetime of zero, triggering unfreed allocations in routeinfo_findalloc() that cause linear memory exhaustion and eventual daemon crash.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; NetworkConfiguration dhcpcd&lt;/p&gt;
&lt;p&gt;dhcpcd through 10.3.2, fixed in commit 708b4a5, contains a memory leak vulnerability in the IPv6 Router Advertisement route information handling that allows an unauthenticated same-link attacker to cause denial of service by sending crafted Router Advertisements. Attackers can repeatedly send Router Advertisements containing Route Information options with a lifetime of zero, triggering unfreed allocations in routeinfo_findalloc() that cause linear memory exhaustion and eventual daemon crash.&lt;/p&gt;</content:encoded>
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