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    <title>Most recent entries from all</title>
    <link>https://cve.radiocsirt.org</link>
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    <lastBuildDate>Tue, 06 Oct 2026 00:00:09 +0000</lastBuildDate>
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      <title>CVE-2024-41007 — tcp: avoid too many retransmit packets</title>
      <link>https://cve.radiocsirt.org/vuln/cve-2024-41007</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;tcp: avoid too many retransmit packets&lt;/p&gt;
&lt;p&gt;If a TCP socket is using TCP_USER_TIMEOUT, and the other peer
retracted its window to zero, tcp_retransmit_timer() can
retransmit a packet every two jiffies (2 ms for HZ=1000),
for about 4 minutes after TCP_USER_TIMEOUT has &amp;#39;expired&amp;#39;.&lt;/p&gt;
&lt;p&gt;The fix is to make sure tcp_rtx_probe0_timed_out() takes
icsk-&amp;gt;icsk_user_timeout into account.&lt;/p&gt;
&lt;p&gt;Before blamed commit, the socket would not timeout after
icsk-&amp;gt;icsk_user_timeout, but would use standard exponential
backoff for the retransmits.&lt;/p&gt;
&lt;p&gt;Also worth noting that before commit e89688e3e978 (&amp;#34;net: tcp:
fix unexcepted socket die when snd_wnd is 0&amp;#34;), the issue
would last 2 minutes instead of 4.&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;tcp: avoid too many retransmit packets&lt;/p&gt;
&lt;p&gt;If a TCP socket is using TCP_USER_TIMEOUT, and the other peer
retracted its window to zero, tcp_retransmit_timer() can
retransmit a packet every two jiffies (2 ms for HZ=1000),
for about 4 minutes after TCP_USER_TIMEOUT has &amp;#39;expired&amp;#39;.&lt;/p&gt;
&lt;p&gt;The fix is to make sure tcp_rtx_probe0_timed_out() takes
icsk-&amp;gt;icsk_user_timeout into account.&lt;/p&gt;
&lt;p&gt;Before blamed commit, the socket would not timeout after
icsk-&amp;gt;icsk_user_timeout, but would use standard exponential
backoff for the retransmits.&lt;/p&gt;
&lt;p&gt;Also worth noting that before commit e89688e3e978 (&amp;#34;net: tcp:
fix unexcepted socket die when snd_wnd is 0&amp;#34;), the issue
would last 2 minutes instead of 4.&lt;/p&gt;</content:encoded>
      <guid isPermaLink="false">https://cve.radiocsirt.org/vuln/cve-2024-41007</guid>
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