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    <lastBuildDate>Tue, 29 Sep 2026 23:04:36 +0000</lastBuildDate>
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      <title>CVE-2025-21788 — net: ethernet: ti: am65-cpsw: fix memleak in certain XDP cases</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2025-21788</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;net: ethernet: ti: am65-cpsw: fix memleak in certain XDP cases&lt;/p&gt;
&lt;p&gt;If the XDP program doesn&amp;#39;t result in XDP_PASS then we leak the
memory allocated by am65_cpsw_build_skb().&lt;/p&gt;
&lt;p&gt;It is pointless to allocate SKB memory before running the XDP
program as we would be wasting CPU cycles for cases other than XDP_PASS.
Move the SKB allocation after evaluating the XDP program result.&lt;/p&gt;
&lt;p&gt;This fixes the memleak. A performance boost is seen for XDP_DROP test.&lt;/p&gt;
&lt;p&gt;XDP_DROP test:
Before: 460256 rx/s                  0 err/s
After:  784130 rx/s                  0 err/s&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;net: ethernet: ti: am65-cpsw: fix memleak in certain XDP cases&lt;/p&gt;
&lt;p&gt;If the XDP program doesn&amp;#39;t result in XDP_PASS then we leak the
memory allocated by am65_cpsw_build_skb().&lt;/p&gt;
&lt;p&gt;It is pointless to allocate SKB memory before running the XDP
program as we would be wasting CPU cycles for cases other than XDP_PASS.
Move the SKB allocation after evaluating the XDP program result.&lt;/p&gt;
&lt;p&gt;This fixes the memleak. A performance boost is seen for XDP_DROP test.&lt;/p&gt;
&lt;p&gt;XDP_DROP test:
Before: 460256 rx/s                  0 err/s
After:  784130 rx/s                  0 err/s&lt;/p&gt;</content:encoded>
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