kernel: kvm: Information leak within a KVM guest
Published Jan 31, 2020
6.2
MEDIUMCVSS 3.1
EPSS 0.62%
Description
In a Linux KVM guest that has PV TLB enabled, a process in the guest kernel may be able to read memory locations from another process in the same guest. This problem is limit to the host running linux kernel 4.10 with a guest running linux kernel 4.16 or later. The problem mainly affects AMD processors but Intel CPUs cannot be ruled out.
Affected products
-
- Version 4.10 to 5.6StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Linux | Linux Kernel | n/a |
|
- ≥ 4.16
- 4.10
No data.
Red Hat Enterprise Linux 8
kernel-0:4.18.0-193.13.2.el8_2
Fixed · RHSA-2020:3010
Red Hat Enterprise Linux 8
kernel-rt-0:4.18.0-193.13.2.rt13.65.el8_2
Fixed · RHSA-2020:3016
Red Hat Enterprise Linux 5
kernel
Not affected
Red Hat Enterprise Linux 6
kernel
Not affected
Red Hat Enterprise Linux 7
kernel
Not affected
Red Hat Enterprise Linux 7
kernel-alt
Not affected
Red Hat Enterprise Linux 7
kernel-rt
Not affected
Red Hat Enterprise MRG 2
kernel-rt
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 8 | kernel-0:4.18.0-193.13.2.el8_2 | Fixed | RHSA-2020:3010 |
| Red Hat Enterprise Linux 8 | kernel-rt-0:4.18.0-193.13.2.rt13.65.el8_2 | Fixed | RHSA-2020:3016 |
| Red Hat Enterprise Linux 5 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 6 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kernel-alt | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kernel-rt | Not affected | n/a |
| Red Hat Enterprise MRG 2 | kernel-rt | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat mitigation
This issue can only be resolved by applying updates. Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
2 other sources (CVE.org, Red Hat) ▾
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
No CVSS v3.0 score for this CVE.
AV:L/AC:M/Au:N/C:P/I:N/A:N
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
NoTechnical Impact
PartialDecision
n/aAssessed Sep 30, 2024 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (14 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 0.62% (0.00619) | 47.78th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.61% (0.00613) | 44.49th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.04% (0.00036) | 6.98th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.05% (0.00050) | 21.44th | v3 (v2023.03.01) |
| Jun 7, 2024 | 0.05% (0.00050) | 19.22th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.05% (0.00050) | 17.22th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.55% (0.01547) | 74.98th | v2 (v2022.01.01) |
| Feb 23, 2023 | 1.55% (0.01547) | 74.94th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.55% (0.01547) | 72.92th | v2 (v2022.01.01) |
| Feb 4, 2022 | 5.84% (0.05839) | 77.39th | v2 (v2022.01.01) |
| Feb 3, 2022 | 11.74% (0.11741) | 88.45th | v1 |
| Jan 6, 2022 | 11.74% (0.11741) | 88.31th | v1 |
| Sep 1, 2021 | 2.88% (0.02880) | 80.71th | v1 |
| Apr 14, 2021 | 2.88% (0.02880) | 0.00th | v1 |
References (17)
- http://packetstormsecurity.com/files/157233/Kernel-Live-Patch-Security-Notice-LSN-0065-1.html x_refsource_MISC
- http://www.openwall.com/lists/oss-security/2020/01/30/4 mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2019-3016 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1792167 x_refsource_CONFIRMIssue TrackingThird Party Advisory
- https://git.kernel.org/linus/1eff70a9abd46f175defafd29bc17ad456f398a7 x_refsource_CONFIRMPatchVendor Advisory
- https://git.kernel.org/linus/8c6de56a42e0c657955e12b882a81ef07d1d073e x_refsource_CONFIRMPatchVendor Advisory
- https://git.kernel.org/linus/917248144db5d7320655dbb41d3af0b8a0f3d589 x_refsource_CONFIRMPatchVendor Advisory
- https://git.kernel.org/linus/a6bd811f1209fe1c64c9f6fd578101d6436c6b6e x_refsource_CONFIRMPatchVendor Advisory
- https://git.kernel.org/linus/b043138246a41064527cf019a3d51d9f015e9796 x_refsource_CONFIRMPatchVendor Advisory
- https://lore.kernel.org/lkml/1580407316-11391-1-git-send-email-pbonzini%40redhat.com/ x_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2019-3016
- https://security.netapp.com/advisory/ntap-20200313-0003/ x_refsource_CONFIRM
- https://usn.ubuntu.com/4300-1/ vendor-advisoryx_refsource_UBUNTU
- https://usn.ubuntu.com/4301-1/ vendor-advisoryx_refsource_UBUNTU
- https://www.cve.org/CVERecord?id=CVE-2019-3016
- https://www.debian.org/security/2020/dsa-4699 vendor-advisoryx_refsource_DEBIAN
- https://www.openwall.com/lists/oss-security/2020/01/30/4
Change history (0)
No recorded changes yet.