In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
KVM: x86: Re-pend GET_NESTED_STATE_PAGES if getting said pages fails<\/p>\n
Re-pend GET_NESTED_STATE_PAGES before exiting to userspace if getting the
\nnested pages fails in the KVM_RUN path. If userspace re-runs the vCPU, and
\nvmcs02 holds valid PFNs from the *previous* run of L2, then KVM could
\nre-enter L2 with stale, unpinned PFNs mapped into e.g. the vAPIC page.<\/p>\n
Note, both SVM and VMX (as of commit 11722439fb20 (“KVM: nVMX: Ensure
\nKVM_REQ_GET_NESTED_STATE_PAGES is cleared on VM-Exit”) ensure the request
\nis cleared on VM-Exit (including the “forced” case), i.e. there is no risk
\nof double-mapping due to emulated VMLAUNCH\/VMRESUME\/VMRUN *and* the request
\ntrying to map the nested pages.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
KVM: x86: Re-pend GET_NESTED_STATE_PAGES if getting said pages fails<\/p>\n
Re-pend GET_NESTED_STATE_PAGES before exiting to userspace if<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-41335","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/41335","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=41335"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=41335"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=41335"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}