In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
svcrdma: Reject oversized Read segments at decode time<\/p>\n
The RPC\/RDMA Read list decoder stores wire-supplied segment
\nlengths without validation. xdr_count_read_segments() checks
\n4-byte alignment for non-zero position values but does not
\ncap the segment length.<\/p>\n
An oversized rs_length reaches svc_rdma_build_read_segment(),
\nwhich derives nr_bvec from it and can drive a large dynamic
\nbvec allocation before verifying that enough rq_pages remain.
\nIf the post-allocation page-overrun guard fires, the freshly
\nacquired rw context is not returned, leaking the resource.<\/p>\n
Reject any segment whose length exceeds the receive context’s
\npage budget during Read list decoding, consistent with how
\nxdr_check_write_chunk() bounds Write segment counts against
\nrc_maxpages. Also return the rw context on the existing
\npost-allocation overrun path in svc_rdma_build_read_segment(),
\nkeeping that defensive guard balanced.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
svcrdma: Reject oversized Read segments at decode time<\/p>\n
The RPC\/RDMA Read list decoder stores wire-supplied segment
\nlengths without<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-21451","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/21451","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=21451"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=21451"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=21451"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}