Note:
This project will be discontinued after December 13, 2021. [more]
2019-04-09
A flaw was found in the way KVM hypervisor handled x2APIC Machine Specific Rregister (MSR) access with nested(=1) virtualization enabled. In that, L1 guest could access L0's APIC register values via L2 guest, when 'virtualize x2APIC mode' is enabled. A guest could use this flaw to potentially crash the host kernel resulting in DoS issue. Kernel versions from 4.16 and newer are vulnerable to this issue.
Products | Ubuntu_linux, Fedora, Linux_kernel, Enterprise_linux, Enterprise_linux_eus, Enterprise_linux_for_real_time, Enterprise_linux_for_real_time_for_nfv, Enterprise_linux_for_real_time_for_nfv_tus, Enterprise_linux_for_real_time_tus, Enterprise_linux_server_aus, Enterprise_linux_server_tus |
Type | Incorrect Authorization (CWE-863) |
First patch | - None (likely due to unavailable code) |
Links |
• https://access.redhat.com/errata/RHSA-2019:2741
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3887 • https://usn.ubuntu.com/3980-1/ • https://access.redhat.com/errata/RHSA-2019:2703 • https://usn.ubuntu.com/3980-2/ |