Kernel: kvm: OOB memory write via kvm_dev_ioctl_get_cpuid
Published Jan 9, 2020
6.1
MEDIUMCVSS 3.1
EPSS 0.68%
Description
An out-of-bounds memory write issue was found in the Linux Kernel, version 3.13 through 5.4, in the way the Linux kernel's KVM hypervisor handled the 'KVM_GET_EMULATED_CPUID' ioctl(2) request to get CPUID features emulated by the KVM hypervisor. A user or process able to access the '/dev/kvm' device could use this flaw to crash the system, resulting in a denial of service.
Affected products
-
- Version 3.13 through 5.4StatusaffectedConstraints-
- Version
Configuration 1
- ≥ 3.13 · ≤ 5.4
Configuration 2
- 7.0
- 8.0
No data.
Red Hat Enterprise Linux 7
kernel-0:3.10.0-1160.el7
Fixed · RHSA-2020:4060
Red Hat Enterprise Linux 7
kernel-rt-0:3.10.0-1160.rt56.1131.el7
Fixed · RHSA-2020:4062
Red Hat Enterprise Linux 8
kernel-0:4.18.0-240.el8
Fixed · RHSA-2020:4431
Red Hat Enterprise Linux 8
kernel-rt-0:4.18.0-240.rt7.54.el8
Fixed · RHSA-2020:4609
Red Hat Enterprise Linux 5
kernel
Not affected
Red Hat Enterprise Linux 6
kernel
Not affected
Red Hat Enterprise Linux 7
kernel-alt
Not affected
Red Hat Enterprise MRG 2
kernel-rt
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 7 | kernel-0:3.10.0-1160.el7 | Fixed | RHSA-2020:4060 |
| Red Hat Enterprise Linux 7 | kernel-rt-0:3.10.0-1160.rt56.1131.el7 | Fixed | RHSA-2020:4062 |
| Red Hat Enterprise Linux 8 | kernel-0:4.18.0-240.el8 | Fixed | RHSA-2020:4431 |
| Red Hat Enterprise Linux 8 | kernel-rt-0:4.18.0-240.rt7.54.el8 | Fixed | RHSA-2020:4609 |
| 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-alt | Not affected | n/a |
| Red Hat Enterprise MRG 2 | kernel-rt | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue does not affect the versions of Linux kernel as shipped with Red Hat Enterprise Linux 6 and Red Hat Enterprise MRG 2. This issue affects the version of the kernel package as shipped with Red Hat Enterprise Linux 7 and 8. Future kernel updates for Red Hat Enterprise Linux 7 and 8 may address this issue.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H
AV:L/AC:L/Au:N/C:N/I:P/A:C
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 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 3, 2026 | 0.68% (0.00679) | 50.66th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.68% (0.00679) | 47.34th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.02% (0.00024) | 3.77th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.07% (0.00065) | 30.65th | v3 (v2023.03.01) |
| Jun 14, 2024 | 0.07% (0.00065) | 28.64th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.07% (0.00065) | 26.61th | 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 | 15.10% (0.15096) | 89.99th | v1 |
| Jan 6, 2022 | 15.10% (0.15096) | 89.88th | v1 |
| Sep 1, 2021 | 3.81% (0.03812) | 82.91th | v1 |
| Apr 14, 2021 | 3.81% (0.03812) | 0.00th | v1 |
References (19)
- http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00021.html vendor-advisoryx_refsource_SUSE
- http://packetstormsecurity.com/files/155890/Slackware-Security-Advisory-Slackware-14.2-kernel-Updates.html x_refsource_MISCPatchThird Party AdvisoryVDB Entry
- https://access.redhat.com/security/cve/CVE-2019-19332 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1779594 Issue Tracking
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-19332 x_refsource_CONFIRMExploitIssue TrackingPatchThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/01/msg00013.html mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/03/msg00001.html mailing-listx_refsource_MLIST
- https://lore.kernel.org/kvm/000000000000ea5ec20598d90e50%40google.com/ x_refsource_MISC
- https://lore.kernel.org/kvm/000000000000ea5ec20598d90e50@google.com/
- https://nvd.nist.gov/vuln/detail/CVE-2019-19332
- https://security.netapp.com/advisory/ntap-20200204-0002/ x_refsource_CONFIRM
- https://usn.ubuntu.com/4254-1/ vendor-advisoryx_refsource_UBUNTU
- https://usn.ubuntu.com/4254-2/ vendor-advisoryx_refsource_UBUNTU
- https://usn.ubuntu.com/4258-1/ vendor-advisoryx_refsource_UBUNTU
- https://usn.ubuntu.com/4284-1/ vendor-advisoryx_refsource_UBUNTU
- https://usn.ubuntu.com/4287-1/ vendor-advisoryx_refsource_UBUNTU
- https://usn.ubuntu.com/4287-2/ vendor-advisoryx_refsource_UBUNTU
- https://www.cve.org/CVERecord?id=CVE-2019-19332
- https://www.openwall.com/lists/oss-security/2019/12/16/1 x_refsource_MISCExploitMailing ListThird Party Advisory
Change history (0)
No recorded changes yet.