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CVE-2019-3887
A flaw was found in the way KVM hypervisor handled x2APIC Machine Specific Rregister (MSR) access with nested(=1) virtualization enabled.…
Medium6.7EPSS 0.36%
- Published
- Updated
- Reserved
- Assigned by
- redhat
Description
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| redhatCNA (assigner) | 3.0 | Medium6.7 | CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:H |
| NVDNVD · Modified | 3.1 | Medium5.6 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.36% · top 70% of all CVEs (5 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.7.
Weakness
Affected products
- affected from 4.16
References (8)
- 107850 (opens in a new tab)vdb-entryx_transferred
- FEDORA-2019-94dc902948 (opens in a new tab)vendor-advisoryx_transferred
- USN-3980-1 (opens in a new tab)vendor-advisoryx_transferred
- USN-3979-1 (opens in a new tab)vendor-advisoryx_transferred
- USN-3980-2 (opens in a new tab)vendor-advisoryx_transferred
- RHSA-2019:2703 (opens in a new tab)vendor-advisoryx_transferred
- RHSA-2019:2741 (opens in a new tab)vendor-advisoryx_transferred
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3887 (opens in a new tab)x_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2019-3887)Record last updated .