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    <title>Most recent entries from all</title>
    <link>https://vulnerability.circl.lu</link>
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    <lastBuildDate>Sun, 04 Oct 2026 08:23:11 +0000</lastBuildDate>
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      <title>CVE-2023-52628 — netfilter: nftables: exthdr: fix 4-byte stack OOB write</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2023-52628</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;netfilter: nftables: exthdr: fix 4-byte stack OOB write&lt;/p&gt;
&lt;p&gt;If priv-&amp;gt;len is a multiple of 4, then dst[len / 4] can write past
the destination array which leads to stack corruption.&lt;/p&gt;
&lt;p&gt;This construct is necessary to clean the remainder of the register
in case -&amp;gt;len is NOT a multiple of the register size, so make it
conditional just like nft_payload.c does.&lt;/p&gt;
&lt;p&gt;The bug was added in 4.1 cycle and then copied/inherited when
tcp/sctp and ip option support was added.&lt;/p&gt;
&lt;p&gt;Bug reported by Zero Day Initiative project (ZDI-CAN-21950,
ZDI-CAN-21951, ZDI-CAN-21961).&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;netfilter: nftables: exthdr: fix 4-byte stack OOB write&lt;/p&gt;
&lt;p&gt;If priv-&amp;gt;len is a multiple of 4, then dst[len / 4] can write past
the destination array which leads to stack corruption.&lt;/p&gt;
&lt;p&gt;This construct is necessary to clean the remainder of the register
in case -&amp;gt;len is NOT a multiple of the register size, so make it
conditional just like nft_payload.c does.&lt;/p&gt;
&lt;p&gt;The bug was added in 4.1 cycle and then copied/inherited when
tcp/sctp and ip option support was added.&lt;/p&gt;
&lt;p&gt;Bug reported by Zero Day Initiative project (ZDI-CAN-21950,
ZDI-CAN-21951, ZDI-CAN-21961).&lt;/p&gt;</content:encoded>
      <guid isPermaLink="false">https://vulnerability.circl.lu/vuln/cve-2023-52628</guid>
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