In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
usb: gadget: f_uac1_legacy: validate bRequest index in generic_{set,get}_cmd<\/p>\n
generic_set_cmd() and generic_get_cmd() use the low nibble of
\nctrl->bRequest as an index into con->data[]:<\/p>\n
u8 cmd = (ctrl->bRequest & 0x0F); \/* 0 .. 15 *\/
\n …
\n con->data[cmd] = value; \/* OOB when cmd >= 5 *\/<\/p>\n
struct usb_audio_control (include\/linux\/usb\/audio.h) declares data as
\na 5-element array, so indices 5 through 15 write (or read) up to 44
\nbytes past the end of the array on the heap.<\/p>\n
A malicious USB host can craft a class-specific SET_CUR \/ GET_CUR
\nrequest with an arbitrary bRequest value, triggering the out-of-bounds
\naccess from an IRQ completion handler with no further preconditions.<\/p>\n
Add an ARRAY_SIZE() guard to both functions.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
usb: gadget: f_uac1_legacy: validate bRequest index in generic_{set,get}_cmd<\/p>\n
generic_set_cmd() and generic_get_cmd() use the low n<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-41241","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/41241","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=41241"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=41241"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=41241"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}