{"id":41045,"date":"2026-10-19T00:31:55","date_gmt":"2026-10-18T16:31:55","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-98573"},"modified":"2026-10-19T00:31:55","modified_gmt":"2026-10-18T16:31:55","slug":"cve-2026-98573","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-98573","title":{"rendered":"CVE-2026-98573 &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\nnet: skbuff: fix pull"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>net: skbuff: fix pull-bound underflow in skb_checksum_setup_ipv6()<\/p>\n<p>skb_maybe_pull_tail() subtracts skb_headlen(skb) from the unsigned max<br \/>\nargument and passes the result to __pskb_pull_tail() as a signed int.  The<br \/>\nfunction does not ensure that max is at least skb_headlen(skb).<\/p>\n<p>This can happen while parsing IPv6 extension headers when an skb already<br \/>\nhas a linear area larger than MAX_IPV6_HDR_LEN.  Once the parser needs data<br \/>\nbeyond the linear area, max &#8211; skb_headlen(skb) wraps and is converted to a<br \/>\nnegative delta.  __pskb_pull_tail() then passes that negative length to<br \/>\nskb_copy_bits(), where it can become a very large copy length.<\/p>\n<p>Pass the requested length itself as the pull bound at the three<br \/>\nextension-header call sites, so the delta can no longer go negative.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>net: skbuff: fix pull-bound underflow in skb_checksum_setup_ipv6()<\/p>\n<p>skb_maybe_pull_tail() subtracts skb_headlen(skb) from the unsig<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-41045","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/41045","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=41045"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=41045"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=41045"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}