CVE-2026-64126

*** Pendiente de traducción *** In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> Bluetooth: MGMT: validate Add Extended Advertising Data length<br /> <br /> MGMT_OP_ADD_EXT_ADV_DATA is registered as a variable-length command,<br /> with MGMT_ADD_EXT_ADV_DATA_SIZE as the fixed header size. The handler<br /> then uses cp-&gt;adv_data_len and cp-&gt;scan_rsp_len to validate and copy<br /> cp-&gt;data, but it never checks that those bytes are part of the mgmt<br /> command payload.<br /> <br /> A short command can therefore make add_ext_adv_data() pass an<br /> out-of-bounds pointer into tlv_data_is_valid(). If the bytes beyond<br /> the command buffer are addressable, they can also be copied into the<br /> advertising instance as scan response data, where the caller can read<br /> them back via MGMT_OP_GET_ADV_INSTANCE. The trigger requires<br /> CAP_NET_ADMIN in the initial user namespace; KASAN reports an 8-byte<br /> slab-out-of-bounds read.<br /> <br /> Reject commands whose length does not match the fixed header plus both<br /> advertising data lengths before parsing cp-&gt;data.