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.
                
            References
                    | Link | Resource | 
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3887 | Issue Tracking Patch Third Party Advisory | 
| http://www.securityfocus.com/bid/107850 | Third Party Advisory VDB Entry | 
| https://usn.ubuntu.com/3980-1/ | Third Party Advisory | 
| https://usn.ubuntu.com/3979-1/ | Third Party Advisory | 
| https://usn.ubuntu.com/3980-2/ | Third Party Advisory | 
| https://access.redhat.com/errata/RHSA-2019:2703 | Third Party Advisory | 
| https://access.redhat.com/errata/RHSA-2019:2741 | Third Party Advisory | 
| https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IWPOIII2L73HV5PGXSGMRMKQIK47UIYE/ | 
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Information
                Published : 2019-04-09 09:29
Updated : 2023-02-12 15:38
NVD link : CVE-2019-3887
Mitre link : CVE-2019-3887
JSON object : View
CWE
                
                    
                        
                        CWE-863
                        
            Incorrect Authorization
Products Affected
                redhat
- enterprise_linux_for_real_time
 - enterprise_linux
 - enterprise_linux_server_aus
 - enterprise_linux_for_real_time_tus
 - enterprise_linux_for_real_time_for_nfv_tus
 - enterprise_linux_for_real_time_for_nfv
 - enterprise_linux_server_tus
 - enterprise_linux_eus
 
fedoraproject
- fedora
 
canonical
- ubuntu_linux
 
linux
- linux_kernel
 


