In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
HID: magicmouse: prevent unbounded recursion in magicmouse_raw_event()<\/p>\n
magicmouse_raw_event() handles DOUBLE_REPORT_ID (0xf7) packets, which pack
\ntwo touch reports into one, by splitting the packet and calling itself on
\neach half. The only guard against runaway recursion is a “size < 1" check,
\nwhich stops zero-sized calls but does not bound the recursion depth.<\/p>\n
A malicious HID device that matches this driver can send a report starting
\nwith DOUBLE_REPORT_ID and filled with the sequence [0xf7, 0x00]. Each level
\nconsumes two bytes and recurses on the remainder, so an incoming report of
\nup to HID_MAX_BUFFER_SIZE (16 KiB) drives roughly 8000 nested calls. That
\neasily exhausts the 16 KiB kernel stack, leading to a stack overflow: a
\npanic with CONFIG_VMAP_STACK, or memory corruption without it.<\/p>\n
A double report only ever wraps two normal reports; it is never
\nlegitimately nested. Refuse to re-enter the DOUBLE_REPORT_ID case from a
\nrecursive call so the recursion depth is bounded to two, while all valid
\npackets keep being parsed exactly as before.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
HID: magicmouse: prevent unbounded recursion in magicmouse_raw_event()<\/p>\n
magicmouse_raw_event() handles DOUBLE_REPORT_ID (0xf7) pack<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-17287","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/17287","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=17287"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=17287"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=17287"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}