In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
net: gue: reject invalid REMCSUM offsets<\/p>\n
The REMCSUM option carries an absolute checksum start and checksum field
\noffset. gue_remcsum() passes them to skb_remcsum_process(), whose
\npartial path stores offset – start in the u16 skb->csum_offset variable.
\nIf offset is less than start, this underflows.<\/p>\n
A forwarded packet can retain CHECKSUM_PARTIAL and reach a NETIF_F_HW_CSUM
\ndriver which trusts the metadata, leading skb_copy_and_csum_dev() to write
\ntwo bytes about 64 KiB beyond the destination buffer.<\/p>\n
Reject reversed tuples in validate_gue_flags(), after the existing length
\nvalidation, so all GUE parsers enforce the ordering in one place.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
net: gue: reject invalid REMCSUM offsets<\/p>\n
The REMCSUM option carries an absolute checksum start and checksum field
\noffset. gue_remc<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-41093","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/41093","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=41093"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=41093"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=41093"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}