HIGH7.8
arch/x86/kvm/mmu.c in the Linux kernel through 4.13.5, when nested virtualisation is used, does not properly traverse guest pagetable entries to resolve a guest virtual address, which allows L1 guest OS users to execute arbitrary code on the host OS or cause a denial of service (incorrect index during page walking, and host OS crash), aka an "MMU potential stack buffer overrun."
CVSS 2.0MEDIUM 6.9
CVSS:2.0/AV:L/AC:M/Au:N/C:C/I:C/A:CCVSS 3.xHIGH 7.8
CVSS:3.x/CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:HReferences
- http://www.securityfocus.com/bid/101267
- https://access.redhat.com/errata/RHSA-2018:0395
- https://access.redhat.com/errata/RHSA-2018:0412
- https://bugzilla.redhat.com/show_bug.cgi?id=1500380
- https://patchwork.kernel.org/patch/9996579/
- https://patchwork.kernel.org/patch/9996587/
- http://www.securityfocus.com/bid/101267
- https://access.redhat.com/errata/RHSA-2018:0395
- https://access.redhat.com/errata/RHSA-2018:0412
- https://bugzilla.redhat.com/show_bug.cgi?id=1500380
- https://patchwork.kernel.org/patch/9996579/
- https://patchwork.kernel.org/patch/9996587/