In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
io_uring\/query: cap user size passed to copy_struct_to_user<\/p>\n
io_handle_query_entry() clamps hdr.size for the inbound copy_from_user()
\nbut keeps the original user value as usize. copy_struct_to_user() uses
\nthat usize and, when it is larger than the kernel result, clear_user()s
\nthe trailing bytes.<\/p>\n
As hdr.size is a __u32, a query can request nearly 4 GiB of zeroing,
\nincluding on the error path where res_size stays 0. The interface is
\nreachable without a ring via IORING_REGISTER_QUERY.<\/p>\n
Reject sizes larger than PAGE_SIZE, as recommended for copy_struct_*
\ninterfaces.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
io_uring\/query: cap user size passed to copy_struct_to_user<\/p>\n
io_handle_query_entry() clamps hdr.size for the inbound copy_from_user<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-21342","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/21342","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=21342"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=21342"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=21342"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}