In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
selinux: do not cancel a policy conversion that never started<\/p>\n
sel_write_load() calls selinux_policy_cancel() when sel_make_policy_nodes()
\nfails, and that helper dereferences the outgoing policy to cancel its
\nsidtab conversion. On the first policy load there is no outgoing policy:
\nsecurity_load_policy() returns early for that case, before it converts
\nanything, and state->policy is still NULL. A first load that fails while
\nbuilding the selinuxfs tree therefore takes a NULL dereference in
\nselinux_policy_cancel(), reached from a write(2) to \/sys\/fs\/selinux\/load.<\/p>\n
Skip the cancel when there is no old policy, mirroring the check
\nsecurity_load_policy() already makes before it converts.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
selinux: do not cancel a policy conversion that never started<\/p>\n
sel_write_load() calls selinux_policy_cancel() when sel_make_policy_<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-3408","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/3408","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=3408"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3408"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3408"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}