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    <link>https://vulnerability.circl.lu</link>
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    <lastBuildDate>Mon, 28 Sep 2026 23:40:40 +0000</lastBuildDate>
    <item>
      <title>CVE-2026-23339 — nfc: nci: free skb on nci_transceive early error paths</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2026-23339</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;nfc: nci: free skb on nci_transceive early error paths&lt;/p&gt;
&lt;p&gt;nci_transceive() takes ownership of the skb passed by the caller,
but the -EPROTO, -EINVAL, and -EBUSY error paths return without
freeing it.&lt;/p&gt;
&lt;p&gt;Due to issues clearing NCI_DATA_EXCHANGE fixed by subsequent changes
the nci/nci_dev selftest hits the error path occasionally in NIPA,
and kmemleak detects leaks:&lt;/p&gt;
&lt;p&gt;unreferenced object 0xff11000015ce6a40 (size 640):
  comm &amp;#34;nci_dev&amp;#34;, pid 3954, jiffies 4295441246
  hex dump (first 32 bytes):
    6b 6b 6b 6b 00 a4 00 0c 02 e1 03 6b 6b 6b 6b 6b  kkkk.......kkkkk
    6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
  backtrace (crc 7c40cc2a):
    kmem_cache_alloc_node_noprof+0x492/0x630
    __alloc_skb+0x11e/0x5f0
    alloc_skb_with_frags+0xc6/0x8f0
    sock_alloc_send_pskb+0x326/0x3f0
    nfc_alloc_send_skb+0x94/0x1d0
    rawsock_sendmsg+0x162/0x4c0
    do_syscall_64+0x117/0xfc0&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;nfc: nci: free skb on nci_transceive early error paths&lt;/p&gt;
&lt;p&gt;nci_transceive() takes ownership of the skb passed by the caller,
but the -EPROTO, -EINVAL, and -EBUSY error paths return without
freeing it.&lt;/p&gt;
&lt;p&gt;Due to issues clearing NCI_DATA_EXCHANGE fixed by subsequent changes
the nci/nci_dev selftest hits the error path occasionally in NIPA,
and kmemleak detects leaks:&lt;/p&gt;
&lt;p&gt;unreferenced object 0xff11000015ce6a40 (size 640):
  comm &amp;#34;nci_dev&amp;#34;, pid 3954, jiffies 4295441246
  hex dump (first 32 bytes):
    6b 6b 6b 6b 00 a4 00 0c 02 e1 03 6b 6b 6b 6b 6b  kkkk.......kkkkk
    6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
  backtrace (crc 7c40cc2a):
    kmem_cache_alloc_node_noprof+0x492/0x630
    __alloc_skb+0x11e/0x5f0
    alloc_skb_with_frags+0xc6/0x8f0
    sock_alloc_send_pskb+0x326/0x3f0
    nfc_alloc_send_skb+0x94/0x1d0
    rawsock_sendmsg+0x162/0x4c0
    do_syscall_64+0x117/0xfc0&lt;/p&gt;</content:encoded>
      <guid isPermaLink="false">https://vulnerability.circl.lu/vuln/cve-2026-23339</guid>
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