In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
sctp: hold asoc or transport before mod_timer() in timer handlers<\/p>\n
Take the association or transport reference before rearming a timer in the
\ntimer handlers.<\/p>\n
The existing code calls mod_timer() before taking the reference needed by
\nthe rearmed timer without holding the sock lock. This creates a race with
\ntimer cleanup: if the timer is deleted after mod_timer() returns but before
\nthe reference is taken, the cleanup path can drop the timer’s reference and
\ndestroy the transport or association. The timer handler then takes a
\nreference on the already freed object and eventually drops it, causing a
\nrefcount underflow.<\/p>\n
Hold the object before mod_timer() and drop the reference if mod_timer()
\nreports that the timer was already pending in timer handlers. Apply the
\nsame ordering to the proto-unreachable path, which can rearm a transport
\ntimer outside the timer handlers without holding the sock lock.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
sctp: hold asoc or transport before mod_timer() in timer handlers<\/p>\n
Take the association or transport reference before rearming a ti<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-41058","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/41058","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=41058"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=41058"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=41058"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}