In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
KVM: SVM: Disable AVIC IPI virtualization on Hygon Family 18h (erratum #1235)<\/p>\n
Hygon Family 18h CPUs are derived from AMD Family 17h (Zen1) silicon and
\nshare the same erratum #1235: hardware may read a stale IsRunning=1 bit
\nduring ICR write emulation and silently fail to generate an
\nAVIC_IPI_FAILURE_TARGET_NOT_RUNNING VM-Exit on the sending vCPU.<\/p>\n
The absence of the VM-Exit causes KVM to miss the required wakeup of
\nblocking target vCPUs, leading to hung vCPUs and unbounded delays in
\nguest execution.<\/p>\n
Extend the existing AMD Family 17h erratum #1235 workaround to also cover
\nHygon Family 18h. With IPI virtualization disabled, KVM never sets
\nIsRunning=1 in the Physical ID table, so every non-self IPI generates a
\nVM-Exit and is correctly emulated.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
KVM: SVM: Disable AVIC IPI virtualization on Hygon Family 18h (erratum #1235)<\/p>\n
Hygon Family 18h CPUs are derived from AMD Family 17<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-15111","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/15111","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=15111"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=15111"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=15111"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}