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    <title>Most recent entries from all</title>
    <link>https://db.gcve.eu</link>
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    <lastBuildDate>Mon, 26 Oct 2026 21:47:22 +0000</lastBuildDate>
    <item>
      <title>CVE-2026-99072 — ipv4: stop route notification sizing when nexthop group shrinks</title>
      <link>https://db.gcve.eu/vuln/cve-2026-99072</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;ipv4: stop route notification sizing when nexthop group shrinks&lt;/p&gt;
&lt;p&gt;Commit 680aea08e78c (&amp;#34;net: ipv4: Emit notification when fib
hardware flags are changed&amp;#34;) added an RCU-only fib_nlmsg_size() call
for asynchronous hardware flag notifications.&lt;/p&gt;
&lt;p&gt;fib_nlmsg_size() checks fib_info_num_path() before each iteration,
then fib_info_nhc() independently reloads nh-&amp;gt;nh_grp. If
RTM_NEWNEXTHOP replaces a group with fewer paths between those loads,
fib_info_nhc() returns NULL and fib_nexthop_nlmsg_size() dereferences
it.&lt;/p&gt;
&lt;p&gt;Stop sizing when the indexed path is absent. Nexthop groups are
dense, so the current snapshot has no later path.&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;ipv4: stop route notification sizing when nexthop group shrinks&lt;/p&gt;
&lt;p&gt;Commit 680aea08e78c (&amp;#34;net: ipv4: Emit notification when fib
hardware flags are changed&amp;#34;) added an RCU-only fib_nlmsg_size() call
for asynchronous hardware flag notifications.&lt;/p&gt;
&lt;p&gt;fib_nlmsg_size() checks fib_info_num_path() before each iteration,
then fib_info_nhc() independently reloads nh-&amp;gt;nh_grp. If
RTM_NEWNEXTHOP replaces a group with fewer paths between those loads,
fib_info_nhc() returns NULL and fib_nexthop_nlmsg_size() dereferences
it.&lt;/p&gt;
&lt;p&gt;Stop sizing when the indexed path is absent. Nexthop groups are
dense, so the current snapshot has no later path.&lt;/p&gt;</content:encoded>
      <guid isPermaLink="false">https://db.gcve.eu/vuln/cve-2026-99072</guid>
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