In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
vxlan: mdb: Fix source list corruption on a failed replace<\/p>\n
When replacing the source list of an MDB remote entry, all existing
\nsources are first marked for deletion and vxlan_mdb_remote_srcs_add()
\nis then called to add the new source list. Sources present in the new
\nlist have their deletion mark cleared, and any sources left marked
\nafterwards are removed.<\/p>\n
If vxlan_mdb_remote_srcs_add() fails partway through, its error path
\ndeletes all entries on the remote’s source list. That rollback is only
\ncorrect for its other caller, vxlan_mdb_remote_add(), where the remote
\nwas just allocated and the list contains solely entries added during
\nthe call. On the replace path the list also holds pre-existing sources,
\nso a failed replace tears them down together with their (S, G)
\nforwarding entries instead of leaving the entry unchanged.<\/p>\n
This is reachable from an existing (*, G) remote. An EXCLUDE filter
\nthat loses sources starts forwarding traffic that should be blocked,
\nwhile an INCLUDE filter that loses sources drops traffic that should be
\nforwarded.<\/p>\n
Mark entries created during the current pass with a new
\nVXLAN_SGRP_F_NEW flag. On failure, delete only those entries and clear
\nthe deletion mark on the pre-existing ones, so a failed replace leaves
\nthe source list untouched. Retain the flag until the whole operation
\nsucceeds and then clear it. Also stop vxlan_mdb_remote_src_add() from
\ndeleting a pre-existing entry it only looked up when adding that
\nentry’s forwarding entry fails.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
vxlan: mdb: Fix source list corruption on a failed replace<\/p>\n
When replacing the source list of an MDB remote entry, all existing
\nsou<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-5330","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/5330","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=5330"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=5330"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=5330"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}