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    <lastBuildDate>Wed, 07 Oct 2026 04:58:24 +0000</lastBuildDate>
    <item>
      <title>CVE-2021-47238 — net: ipv4: fix memory leak in ip_mc_add1_src</title>
      <link>https://cve.radiocsirt.org/vuln/cve-2021-47238</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Linux, linux_kernel&lt;/p&gt;
&lt;p&gt;In the Linux kernel, the following vulnerability has been resolved:&lt;/p&gt;
&lt;p&gt;net: ipv4: fix memory leak in ip_mc_add1_src&lt;/p&gt;
&lt;p&gt;BUG: memory leak
unreferenced object 0xffff888101bc4c00 (size 32):
  comm &amp;#34;syz-executor527&amp;#34;, pid 360, jiffies 4294807421 (age 19.329s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
    01 00 00 00 00 00 00 00 ac 14 14 bb 00 00 02 00 ................
  backtrace:
    [&amp;lt;00000000f17c5244&amp;gt;] kmalloc include/linux/slab.h:558 [inline]
    [&amp;lt;00000000f17c5244&amp;gt;] kzalloc include/linux/slab.h:688 [inline]
    [&amp;lt;00000000f17c5244&amp;gt;] ip_mc_add1_src net/ipv4/igmp.c:1971 [inline]
    [&amp;lt;00000000f17c5244&amp;gt;] ip_mc_add_src+0x95f/0xdb0 net/ipv4/igmp.c:2095
    [&amp;lt;000000001cb99709&amp;gt;] ip_mc_source+0x84c/0xea0 net/ipv4/igmp.c:2416
    [&amp;lt;0000000052cf19ed&amp;gt;] do_ip_setsockopt net/ipv4/ip_sockglue.c:1294 [inline]
    [&amp;lt;0000000052cf19ed&amp;gt;] ip_setsockopt+0x114b/0x30c0 net/ipv4/ip_sockglue.c:1423
    [&amp;lt;00000000477edfbc&amp;gt;] raw_setsockopt+0x13d/0x170 net/ipv4/raw.c:857
    [&amp;lt;00000000e75ca9bb&amp;gt;] __sys_setsockopt+0x158/0x270 net/socket.c:2117
    [&amp;lt;00000000bdb993a8&amp;gt;] __do_sys_setsockopt net/socket.c:2128 [inline]
    [&amp;lt;00000000bdb993a8&amp;gt;] __se_sys_setsockopt net/socket.c:2125 [inline]
    [&amp;lt;00000000bdb993a8&amp;gt;] __x64_sys_setsockopt+0xba/0x150 net/socket.c:2125
    [&amp;lt;000000006a1ffdbd&amp;gt;] do_syscall_64+0x40/0x80 arch/x86/entry/common.c:47
    [&amp;lt;00000000b11467c4&amp;gt;] entry_SYSCALL_64_after_hwframe+0x44/0xae&lt;/p&gt;
&lt;p&gt;In commit 24803f38a5c0 (&amp;#34;igmp: do not remove igmp souce l…&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Linux, linux_kernel&lt;/p&gt;
&lt;p&gt;In the Linux kernel, the following vulnerability has been resolved:&lt;/p&gt;
&lt;p&gt;net: ipv4: fix memory leak in ip_mc_add1_src&lt;/p&gt;
&lt;p&gt;BUG: memory leak
unreferenced object 0xffff888101bc4c00 (size 32):
  comm &amp;#34;syz-executor527&amp;#34;, pid 360, jiffies 4294807421 (age 19.329s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
    01 00 00 00 00 00 00 00 ac 14 14 bb 00 00 02 00 ................
  backtrace:
    [&amp;lt;00000000f17c5244&amp;gt;] kmalloc include/linux/slab.h:558 [inline]
    [&amp;lt;00000000f17c5244&amp;gt;] kzalloc include/linux/slab.h:688 [inline]
    [&amp;lt;00000000f17c5244&amp;gt;] ip_mc_add1_src net/ipv4/igmp.c:1971 [inline]
    [&amp;lt;00000000f17c5244&amp;gt;] ip_mc_add_src+0x95f/0xdb0 net/ipv4/igmp.c:2095
    [&amp;lt;000000001cb99709&amp;gt;] ip_mc_source+0x84c/0xea0 net/ipv4/igmp.c:2416
    [&amp;lt;0000000052cf19ed&amp;gt;] do_ip_setsockopt net/ipv4/ip_sockglue.c:1294 [inline]
    [&amp;lt;0000000052cf19ed&amp;gt;] ip_setsockopt+0x114b/0x30c0 net/ipv4/ip_sockglue.c:1423
    [&amp;lt;00000000477edfbc&amp;gt;] raw_setsockopt+0x13d/0x170 net/ipv4/raw.c:857
    [&amp;lt;00000000e75ca9bb&amp;gt;] __sys_setsockopt+0x158/0x270 net/socket.c:2117
    [&amp;lt;00000000bdb993a8&amp;gt;] __do_sys_setsockopt net/socket.c:2128 [inline]
    [&amp;lt;00000000bdb993a8&amp;gt;] __se_sys_setsockopt net/socket.c:2125 [inline]
    [&amp;lt;00000000bdb993a8&amp;gt;] __x64_sys_setsockopt+0xba/0x150 net/socket.c:2125
    [&amp;lt;000000006a1ffdbd&amp;gt;] do_syscall_64+0x40/0x80 arch/x86/entry/common.c:47
    [&amp;lt;00000000b11467c4&amp;gt;] entry_SYSCALL_64_after_hwframe+0x44/0xae&lt;/p&gt;
&lt;p&gt;In commit 24803f38a5c0 (&amp;#34;igmp: do not remove igmp souce l…&lt;/p&gt;</content:encoded>
      <guid isPermaLink="false">https://cve.radiocsirt.org/vuln/cve-2021-47238</guid>
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