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    <link>https://vulnerability.circl.lu</link>
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    <lastBuildDate>Wed, 30 Sep 2026 04:39:00 +0000</lastBuildDate>
    <item>
      <title>CVE-2026-43062 — Bluetooth: L2CAP: Fix type confusion in l2cap_ecred_reconf_rsp()</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2026-43062</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;Bluetooth: L2CAP: Fix type confusion in l2cap_ecred_reconf_rsp()&lt;/p&gt;
&lt;p&gt;l2cap_ecred_reconf_rsp() casts the incoming data to struct
l2cap_ecred_conn_rsp (the ECRED *connection* response, 8 bytes with
result at offset 6) instead of struct l2cap_ecred_reconf_rsp (2 bytes
with result at offset 0).&lt;/p&gt;
&lt;p&gt;This causes two problems:&lt;/p&gt;
&lt;p&gt;- The sizeof(*rsp) length check requires 8 bytes instead of the
   correct 2, so valid L2CAP_ECRED_RECONF_RSP packets are rejected
   with -EPROTO.&lt;/p&gt;
&lt;p&gt;- rsp-&amp;gt;result reads from offset 6 instead of offset 0, returning
   wrong data when the packet is large enough to pass the check.&lt;/p&gt;
&lt;p&gt;Fix by using the correct type.  Also pass the already byte-swapped
result variable to BT_DBG instead of the raw __le16 field.&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;Bluetooth: L2CAP: Fix type confusion in l2cap_ecred_reconf_rsp()&lt;/p&gt;
&lt;p&gt;l2cap_ecred_reconf_rsp() casts the incoming data to struct
l2cap_ecred_conn_rsp (the ECRED *connection* response, 8 bytes with
result at offset 6) instead of struct l2cap_ecred_reconf_rsp (2 bytes
with result at offset 0).&lt;/p&gt;
&lt;p&gt;This causes two problems:&lt;/p&gt;
&lt;p&gt;- The sizeof(*rsp) length check requires 8 bytes instead of the
   correct 2, so valid L2CAP_ECRED_RECONF_RSP packets are rejected
   with -EPROTO.&lt;/p&gt;
&lt;p&gt;- rsp-&amp;gt;result reads from offset 6 instead of offset 0, returning
   wrong data when the packet is large enough to pass the check.&lt;/p&gt;
&lt;p&gt;Fix by using the correct type.  Also pass the already byte-swapped
result variable to BT_DBG instead of the raw __le16 field.&lt;/p&gt;</content:encoded>
      <guid isPermaLink="false">https://vulnerability.circl.lu/vuln/cve-2026-43062</guid>
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