kernel: kvm: vmx: host GDT limit corruption
Published Jul 26, 2018
7.8
HIGHCVSS 3.1
EPSS 0.52%
Description
A flaw was found in Linux kernel's KVM virtualization subsystem. The VMX code does not restore the GDT.LIMIT to the previous host value, but instead sets it to 64KB. With a corrupted GDT limit a host's userspace code has an ability to place malicious entries in the GDT, particularly to the per-cpu variables. An attacker can use this to escalate their privileges.
Affected products
- Vendor n/a Product Kernel: Defaultn/a
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||
|---|---|---|---|---|---|---|
| n/a | Kernel: | n/a |
|
Configuration 1
- < 2.6.36
Configuration 2
- 6.0
- 6.0
- 6.4
- 6.5
- 6.6
- 6.0
No data.
Red Hat Enterprise Linux 6
kernel-0:2.6.32-754.3.5.el6
Fixed · RHSA-2018:2390
Red Hat Enterprise Linux 6.4 Advanced Update Support
kernel-0:2.6.32-358.91.4.el6
Fixed · RHSA-2018:2394
Red Hat Enterprise Linux 6.5 Advanced Update Support
kernel-0:2.6.32-431.91.3.el6
Fixed · RHSA-2018:2393
Red Hat Enterprise Linux 6.6 Advanced Update Support
kernel-0:2.6.32-504.72.4.el6
Fixed · RHSA-2018:2392
Red Hat Enterprise Linux 6.6 Telco Extended Update Support
kernel-0:2.6.32-504.72.4.el6
Fixed · RHSA-2018:2392
Red Hat Enterprise Linux 6.7 Extended Update Support
kernel-0:2.6.32-573.60.4.el6
Fixed · RHSA-2018:2391
Red Hat Enterprise Linux 5
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 Linux 8
kernel
Not affected
Red Hat Enterprise MRG 2
realtime-kernel
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | kernel-0:2.6.32-754.3.5.el6 | Fixed | RHSA-2018:2390 |
| Red Hat Enterprise Linux 6.4 Advanced Update Support | kernel-0:2.6.32-358.91.4.el6 | Fixed | RHSA-2018:2394 |
| Red Hat Enterprise Linux 6.5 Advanced Update Support | kernel-0:2.6.32-431.91.3.el6 | Fixed | RHSA-2018:2393 |
| Red Hat Enterprise Linux 6.6 Advanced Update Support | kernel-0:2.6.32-504.72.4.el6 | Fixed | RHSA-2018:2392 |
| Red Hat Enterprise Linux 6.6 Telco Extended Update Support | kernel-0:2.6.32-504.72.4.el6 | Fixed | RHSA-2018:2392 |
| Red Hat Enterprise Linux 6.7 Extended Update Support | kernel-0:2.6.32-573.60.4.el6 | Fixed | RHSA-2018:2391 |
| Red Hat Enterprise Linux 5 | 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 Linux 8 | kernel | Not affected | n/a |
| Red Hat Enterprise MRG 2 | realtime-kernel | Not affected | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
AV:L/AC:L/Au:N/C:C/I:C/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 1, 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 (15 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.52% (0.00520) | 42.04th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.52% (0.00520) | 39.81th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.15% (0.00146) | 32.51th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.06% (0.00062) | 28.60th | v3 (v2023.03.01) |
| Jun 22, 2024 | 0.06% (0.00062) | 26.81th | v3 (v2023.03.01) |
| Jul 20, 2023 | 0.06% (0.00062) | 24.79th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.04% (0.00045) | 12.06th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.28% (0.01282) | 68.34th | v2 (v2022.01.01) |
| Feb 22, 2023 | 1.28% (0.01282) | 68.05th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.28% (0.01282) | 65.91th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.28% (0.01282) | 41.72th | v2 (v2022.01.01) |
| Feb 3, 2022 | 2.48% (0.02476) | 54.92th | v1 |
| Jan 6, 2022 | 2.48% (0.02476) | 54.49th | v1 |
| Sep 1, 2021 | 2.48% (0.02476) | 78.74th | v1 |
| Apr 14, 2021 | 2.48% (0.02476) | 0.00th | v1 |
References (15)
- http://www.securityfocus.com/bid/104905 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2018:2390 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2018:2391 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2018:2392 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2018:2393 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2018:2394 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2018-10901 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1601849 Issue Tracking
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10901 x_refsource_CONFIRMIssue TrackingPatchThird Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3444d7da1839b851eefedd372978d8a982316c36 x_refsource_CONFIRMPatchVendor Advisory
- https://help.ecostruxureit.com/display/public/UADCE725/Security+fixes+in+StruxureWare+Data+Center+Expert+v7.6.0 x_refsource_CONFIRMThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2018-10901
- https://www.cve.org/CVERecord?id=CVE-2018-10901
- https://www.oracle.com/security-alerts/cpujul2020.html x_refsource_MISCThird Party Advisory
- https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html x_refsource_MISCPatchThird Party Advisory
Change history (0)
No recorded changes yet.