In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
Bluetooth: L2CAP: validate connectionless PSM length<\/p>\n
Connectionless L2CAP frames carry a two-byte PSM at the start of the
\npayload. l2cap_recv_frame() currently reads that PSM unconditionally
\nafter validating only the outer L2CAP length.<\/p>\n
A malformed connectionless frame with a zero- or one-byte payload can
\ntherefore make the parser read beyond the advertised skb payload and use
\ntailroom bytes as part of the PSM. A VHCI-backed QEMU reproducer
\ninjected a one-byte connectionless payload and reached the unchecked
\nread.<\/p>\n
Reject connectionless frames that cannot contain the PSM before reading
\nor pulling it. This preserves all valid connectionless frames while
\ndropping only structurally incomplete packets.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
Bluetooth: L2CAP: validate connectionless PSM length<\/p>\n
Connectionless L2CAP frames carry a two-byte PSM at the start of the
\npayload.<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-28655","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/28655","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=28655"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=28655"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=28655"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}