In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
vmxnet3: fix BUG_ON in vmxnet3_get_hdr_len() for Geneve packets<\/p>\n
vmxnet3_get_hdr_len() assumes gdesc->rcd.v4\/v6\/tcp always describe the
\nouter header, but for a Geneve-encapsulated packet the device can set
\nthem based on the inner header instead, signalled by the
\nVMXNET3_RCD_HDR_INNER_SHIFT bit in the completion descriptor. Since the
\nfunction never skips the outer encapsulation, this mismatch triggers:<\/p>\n
– BUG_ON(hdr.ipv4->protocol != IPPROTO_TCP), because the outer
\n protocol is UDP (Geneve), not TCP.
\n– BUG_ON(hdr.eth->h_proto != …), when the tunnel’s outer and inner
\n IP versions differ (e.g. outer IPv6\/inner IPv4 or vice versa).<\/p>\n
Check VMXNET3_RCD_HDR_INNER_SHIFT up front and bail out, since the
\nfunction cannot locate the inner header it would need to parse. Also
\nconvert the remaining BUG_ON()s in this function to return 0
\ndefensively.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
vmxnet3: fix BUG_ON in vmxnet3_get_hdr_len() for Geneve packets<\/p>\n
vmxnet3_get_hdr_len() assumes gdesc->rcd.v4\/v6\/tcp always describe<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-5417","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/5417","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=5417"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=5417"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=5417"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}