Date: Thu, 12 Oct 2017 23:35:35 +0530 (IST) From: P J P <ppandit@...hat.com> To: oss security list <oss-security@...ts.openwall.com> Subject: CVE-2017-12188 Kernel: KVM: MMU potential stack buffer overrun during page walks Hello, Linux kernel built with the KVM virtualisation support(CONFIG_KVM), with nested virtualisation(nVMX) feature enabled(nested=1), is vulnerable to a stack buffer overflow issue. It could occur while traversing guest page table entries to resolve guest virtual address(gva). A L1 guest could use this flaw to crash the host kernel resulting in DoS. OR potentially execute arbitrary code on the host to gain access to the host system. Upstream patch: --------------- -> https://www.spinics.net/lists/kvm/msg156651.html Reference: ---------- -> https://bugzilla.redhat.com/show_bug.cgi?id=1500380 'CVE-2017-12188' assigned by Red Hat Inc. Thank you. -- Prasad J Pandit / Red Hat Product Security Team 47AF CE69 3A90 54AA 9045 1053 DD13 3D32 FE5B 041F
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