In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
RDMA\/rxe: Fix TOCTOU heap overflow in get_srq_wqe<\/p>\n
get_srq_wqe() reads wqe->dma.num_sge from the shared receive queue
\nbuffer, which is mapped into userspace. It validates num_sge against
\nmax_sge, but then re-reads the same field to calculate the memcpy
\nsize. A concurrent userspace thread can modify num_sge between
\nvalidation and use, causing a heap buffer overflow when copying the
\nWQE into qp->resp.srq_wqe.<\/p>\n
Read num_sge into a local variable and use it for both the bounds
\ncheck and the size calculation.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
RDMA\/rxe: Fix TOCTOU heap overflow in get_srq_wqe<\/p>\n
get_srq_wqe() reads wqe->dma.num_sge from the shared receive queue
\nbuffer, which<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-7330","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/7330","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=7330"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7330"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7330"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}