In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
kcm: use WRITE_ONCE() when changing lower socket callbacks<\/p>\n
kcm_attach() replaces a live lower TCP socket’s sk_data_ready and
\nsk_write_space callbacks with KCM handlers, and kcm_unattach() restores
\nthem later. Those callback-pointer updates are still plain stores even
\nthough the same fields can be read and invoked concurrently on other
\nCPUs.<\/p>\n
If another CPU observes an older callback snapshot after the live field
\nhas already been restored, callback execution can run with a mismatched
\ntarget and sk_user_data state, leading to stale or misdirected wakeups.<\/p>\n
Use WRITE_ONCE() for the callback replacement and restore operations so
\nthese shared callback fields follow the same visibility contract already
\nestablished by the earlier 4022 fixes.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
kcm: use WRITE_ONCE() when changing lower socket callbacks<\/p>\n
kcm_attach() replaces a live lower TCP socket’s sk_data_ready and
\nsk_wr<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-7196","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/7196","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=7196"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7196"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7196"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}