In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
Bluetooth: HIDP: reject frames without a transaction header<\/p>\n
hidp_recv_ctrl_frame() and hidp_recv_intr_frame() read skb->data[0]
\nbefore checking that the L2CAP SDU contains a transaction header. A
\nconnected HIDP peer can send an empty basic-mode SDU and make both paths
\nuse an uninitialized byte from skb tailroom.<\/p>\n
KMSAN reports the use in hidp_session_run(), with the uninitialized value
\noriginating in __alloc_skb() through vhci_write(). The control path
\nproduces two reports and the interrupt path produces one.<\/p>\n
The byte can also be controlled by a malformed lower-layer packet. If an
\nHCI ACL packet contains an L2CAP PDU with a declared zero-length payload
\nfollowed by an extra 0x15 byte, l2cap_recv_acldata() reduces skb->len to
\nthe declared PDU length before dispatch. The current HIDP path nevertheless
\nconsumes the extra byte as HIDP_TRANS_HID_CONTROL |
\nHIDP_CTRL_VIRTUAL_CABLE_UNPLUG and terminates the HIDP session. With this
\nchange, the same packet is discarded and a subsequent feature report
\nrequest succeeds.<\/p>\n
Pull the transaction header with skb_pull_data() and discard frames that
\ndo not contain it.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
Bluetooth: HIDP: reject frames without a transaction header<\/p>\n
hidp_recv_ctrl_frame() and hidp_recv_intr_frame() read skb->data[0]
\nbe<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-7502","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/7502","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln"}],"about":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/types\/vuln"}],"wp:attachment":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7502"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7502"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7502"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}