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    <title>Most recent entries from all</title>
    <link>https://vulnerability.circl.lu</link>
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    <lastBuildDate>Tue, 29 Sep 2026 01:59:32 +0000</lastBuildDate>
    <item>
      <title>CVE-2026-23459 — ip_tunnel: adapt iptunnel_xmit_stats() to NETDEV_PCPU_STAT_DSTATS</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2026-23459</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;ip_tunnel: adapt iptunnel_xmit_stats() to NETDEV_PCPU_STAT_DSTATS&lt;/p&gt;
&lt;p&gt;Blamed commits forgot that vxlan/geneve use udp_tunnel[6]_xmit_skb() which
call iptunnel_xmit_stats().&lt;/p&gt;
&lt;p&gt;iptunnel_xmit_stats() was assuming tunnels were only using
NETDEV_PCPU_STAT_TSTATS.&lt;/p&gt;
&lt;p&gt;@syncp offset in pcpu_sw_netstats and pcpu_dstats is different.&lt;/p&gt;
&lt;p&gt;32bit kernels would either have corruptions or freezes if the syncp
sequence was overwritten.&lt;/p&gt;
&lt;p&gt;This patch also moves pcpu_stat_type closer to dev-&amp;gt;{t,d}stats to avoid
a potential cache line miss since iptunnel_xmit_stats() needs to read it.&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;ip_tunnel: adapt iptunnel_xmit_stats() to NETDEV_PCPU_STAT_DSTATS&lt;/p&gt;
&lt;p&gt;Blamed commits forgot that vxlan/geneve use udp_tunnel[6]_xmit_skb() which
call iptunnel_xmit_stats().&lt;/p&gt;
&lt;p&gt;iptunnel_xmit_stats() was assuming tunnels were only using
NETDEV_PCPU_STAT_TSTATS.&lt;/p&gt;
&lt;p&gt;@syncp offset in pcpu_sw_netstats and pcpu_dstats is different.&lt;/p&gt;
&lt;p&gt;32bit kernels would either have corruptions or freezes if the syncp
sequence was overwritten.&lt;/p&gt;
&lt;p&gt;This patch also moves pcpu_stat_type closer to dev-&amp;gt;{t,d}stats to avoid
a potential cache line miss since iptunnel_xmit_stats() needs to read it.&lt;/p&gt;</content:encoded>
      <guid isPermaLink="false">https://vulnerability.circl.lu/vuln/cve-2026-23459</guid>
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