CVE-2019-3887
A flaw was found in the way KVM hypervisor handled x2APIC Machine Specific Rregister (MSR) access with nested(=1) virtualization enabled.…
- 6.7MediumCVSS base score
- 0.36%Exploitation in 30 daysEPSS · top 70% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By redhat
- 3 months later
· 3 months later
Published
- 5 years later
· 5 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
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 (11 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.7.
Affected products
- affected from 4.16
References
References8
- 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)
- EUVD EUVD-2019-13497 (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://cveledger.app/cve/CVE-2019-3887)Record last updated .