A flaw was found in the way Linux kernel KVM hypervisor before 4.18 emulated instructions such as sgdt/sidt/fxsave/fxrstor. It did not check current privilege(CPL) level while emulating unprivileged instructions. An unprivileged guest user/process could use this flaw to potentially escalate privileges inside guest.
CVSS Details
- CVSS 3.1 Base Score: 7.8
- CVSS 3.0 Base Score: 7
- CVSS 3.0 Vector: (CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Centos_linux | — | Upgrade kernel-rtUpgrade kernel | Aug 28, 2019 | Sep 11, 2018 |
| Debian | — | Upgrade linux | Feb 19, 2019 | Sep 11, 2018 |
| Huawei Euleros 2_0_sp5 | — | Upgrade kernel-develUpgrade kernel-headersUpgrade kernel-tools-libsUpgrade perfUpgrade kernelUpgrade python-perfUpgrade kernel-tools | Nov 19, 2019 | Sep 11, 2018 |
| Oracle_linux | — | Upgrade kernel | Aug 15, 2019 | Jun 5, 2018 |
| Redhat_linux | — | Upgrade kernelUpgrade kernel-rt | Aug 7, 2019 | Sep 11, 2018 |
| Suse | — | Upgrade kernel-source-azureUpgrade kernel-azure-baseUpgrade kernel-default-manUpgrade kernel-default-extraUpgrade kernel-devel-azureUpgrade kernel-obs-buildUpgrade kernel-defaultUpgrade kernel-docs | Aug 17, 2018 | Aug 16, 2018 |
| Ubuntu | — | Upgrade linux-image-generic-lpae-hwe-16.04Upgrade linux-image-lowlatencyUpgrade linux-image-gcpUpgrade linux-image-generic-hwe-16.04Upgrade linux-image-4.15.0-1024-raspi2Upgrade linux-image-raspi2Upgrade linux-image-awsUpgrade linux-image-4.15.0-36-generic-lpaeUpgrade linux-image-4.15.0-1023-kvmUpgrade linux-image-kvmUpgrade linux-image-snapdragonUpgrade linux-image-lowlatency-hwe-16.04Upgrade linux-image-4.15.0-36-snapdragonUpgrade linux-image-4.15.0-1021-gcpUpgrade linux-image-gkeUpgrade linux-image-4.15.0-36-genericUpgrade linux-image-genericUpgrade linux-image-oemUpgrade linux-image-4.15.0-36-lowlatencyUpgrade linux-image-4.15.0-1021-oemUpgrade linux-image-4.15.0-1023-awsUpgrade linux-image-generic-lpae | Oct 9, 2018 | Aug 17, 2018 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jan 20, 2025 | Sep 11, 2018 |
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