In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
cxl\/features: Serialize multi-part Get\/Set Feature transfers<\/p>\n
A Get or Set Feature payload larger than the mailbox payload size is
\nsplit into several mailbox commands. mbox_mutex only serializes
\nindividual mailbox commands and is dropped between iterations of these
\nloops. Nothing serializes the multi-part transfer as a whole.
\ncxl_get_feature() and cxl_set_feature() are reachable concurrently
\nfrom fwctl (per-fd RPCs run under a read-held registration lock) and
\nfrom the EDAC scrub\/ECS\/repair paths, so two transfers to the same
\nmailbox can interleave their parts and corrupt the device’s transfer
\ncontext.<\/p>\n
Add a per-mailbox feat_mutex and hold it across the whole transfer in
\nboth functions. It nests outside mbox_mutex (which is taken inside
\ncxl_internal_send_cmd()), and is taken nowhere else, so no lock-ordering
\ninversion is introduced.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
cxl\/features: Serialize multi-part Get\/Set Feature transfers<\/p>\n
A Get or Set Feature payload larger than the mailbox payload size is<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-25953","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/25953","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=25953"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=25953"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=25953"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}