In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
net\/mlx5: E-Switch: fix use-after-free in mlx5_eswitch_termtbl_put<\/p>\n
In mlx5_eswitch_termtbl_put(), the zero-ref cleanup check reads
\ntt->ref_count after termtbl_mutex has been released. Two concurrent
\ncallers on the same mlx5_termtbl_handle race: one decrements ref_count
\nto zero, removes the hash entry, and calls kfree(tt) while the other
\nhas already dropped the mutex and is about to evaluate
\nif (!tt->ref_count), producing a use-after-free.<\/p>\n
Fix this by capturing the result of the decrement into a stack-local
\nlast variable before dropping the mutex. The cleanup decision is now
\nmade entirely under termtbl_mutex, and tt is not touched after
\nkfree.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
net\/mlx5: E-Switch: fix use-after-free in mlx5_eswitch_termtbl_put<\/p>\n
In mlx5_eswitch_termtbl_put(), the zero-ref cleanup check reads<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-29170","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/29170","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=29170"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=29170"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=29170"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}