In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
xfrm: fix compat ALLOCSPI request use-after-free<\/p>\n
xfrm_state_netlink() builds the ALLOCSPI response with
\ndump_one_state(), which already calls alloc_compat() with the response
\nskb and header.<\/p>\n
xfrm_alloc_userspi() then calls alloc_compat() again, but passes the
\noriginal request skb and its header. For a compat request, the
\ntranslator therefore interprets the 228-byte compat xfrm_userspi_info
\nas the 232-byte native layout and reads four bytes past the declared
\npayload. It also publishes the translated child through the request’s
\nfrag_list.<\/p>\n
A multicast clone of the request shares skb_shared_info and can observe
\nthat child. xfrm_user_rcv_msg() frees it after the request handler
\nreturns, racing a compat receiver which may still be copying from it and
\nresulting in a use-after-free.<\/p>\n
Remove the redundant conversion. The response keeps its correct compat
\ntranslation from dump_one_state(), and no child is attached to the
\ninbound request.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
xfrm: fix compat ALLOCSPI request use-after-free<\/p>\n
xfrm_state_netlink() builds the ALLOCSPI response with
\ndump_one_state(), which al<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-33439","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/33439","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=33439"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=33439"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=33439"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}