In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
xfrm: fix stale skb->prev after async crypto steals a GSO segment<\/p>\n
skb_gso_segment() leaves the segment list head with ->prev pointing at
\nthe last segment, an invariant validate_xmit_skb_list() relies on when
\nit sets its tail pointer (tail = skb->prev).<\/p>\n
When validate_xmit_xfrm() walks a GSO list and some segments are stolen
\nby async crypto (->xmit() returns -EINPROGRESS), those segments are
\nunlinked from the list but the head ->prev is never updated. If the
\nlast segment is the one stolen, the returned head still has ->prev
\npointing at it, even though it is now owned by the crypto engine and may
\nbe freed. validate_xmit_skb_list() later does tail->next = skb, writing
\nthrough that stale pointer — a use-after-free.<\/p>\n
Repoint skb->prev at the last retained segment before returning.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
xfrm: fix stale skb->prev after async crypto steals a GSO segment<\/p>\n
skb_gso_segment() leaves the segment list head with ->prev point<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-5473","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/5473","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=5473"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=5473"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=5473"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}