Kernel: KVM: MMU potential stack buffer overrun during page walks
Published Oct 11, 2017
7.8
HIGHCVSS 3.1
EPSS 0.44%
Description
arch/x86/kvm/mmu.c in the Linux kernel through 4.13.5, when nested virtualisation is used, does not properly traverse guest pagetable entries to resolve a guest virtual address, which allows L1 guest OS users to execute arbitrary code on the host OS or cause a denial of service (incorrect index during page walking, and host OS crash), aka an "MMU potential stack buffer overrun."
Affected products
- Vendor n/a Product Linux kernel Defaultn/a
- Version Linux kernelStatusaffectedConstraints-
- 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 | ||||||
|---|---|---|---|---|---|---|---|---|---|
| n/a | Linux kernel | n/a |
|
- ≥ 4.6 · < 4.9.57
- ≥ 4.10 · < 4.13.8
No data.
Red Hat Enterprise Linux 7
kernel-0:3.10.0-693.21.1.el7
Fixed · RHSA-2018:0395
Red Hat Enterprise Linux 7
kernel-rt-0:3.10.0-693.21.1.rt56.639.el7
Fixed · RHSA-2018:0412
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
realtime-kernel
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 7 | kernel-0:3.10.0-693.21.1.el7 | Fixed | RHSA-2018:0395 |
| Red Hat Enterprise Linux 7 | kernel-rt-0:3.10.0-693.21.1.rt56.639.el7 | Fixed | RHSA-2018:0412 |
| 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 | realtime-kernel | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue does not affect the versions of the kernel package as shipped with Red Hat Enterprise Linux 5, 6 and Red Hat Enterprise MRG 2.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
CVSS:3.0/AV:A/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
AV:L/AC:M/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 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 | 0.44% (0.00441) | 36.14th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.44% (0.00441) | 34.94th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.06% (0.00055) | 14.25th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.06% (0.00062) | 28.60th | v3 (v2023.03.01) |
| Jun 13, 2024 | 0.06% (0.00062) | 26.61th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.06% (0.00062) | 24.59th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.55% (0.01547) | 74.98th | v2 (v2022.01.01) |
| Jul 8, 2022 | 1.55% (0.01547) | 73.52th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.50% (0.01505) | 71.56th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.50% (0.01505) | 50.63th | v2 (v2022.01.01) |
| Feb 3, 2022 | 3.14% (0.03139) | 65.22th | v1 |
| Jan 6, 2022 | 3.14% (0.03139) | 64.88th | v1 |
| Sep 1, 2021 | 3.14% (0.03139) | 81.29th | v1 |
| Apr 14, 2021 | 3.14% (0.03139) | 0.00th | v1 |
References (9)
- http://www.securityfocus.com/bid/101267 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2018:0395 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2018:0412 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2017-12188 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1500380 x_refsource_CONFIRMIssue TrackingPatchThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2017-12188
- https://patchwork.kernel.org/patch/9996579/ x_refsource_CONFIRMIssue TrackingPatchVendor Advisory
- https://patchwork.kernel.org/patch/9996587/ x_refsource_CONFIRMIssue TrackingPatchVendor Advisory
- https://www.cve.org/CVERecord?id=CVE-2017-12188
| Link | Providers | Tags |
|---|---|---|
| http://www.securityfocus.com/bid/101267 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| https://access.redhat.com/errata/RHSA-2018:0395 | vendor-advisoryx_refsource_REDHATThird Party Advisory | |
| https://access.redhat.com/errata/RHSA-2018:0412 | vendor-advisoryx_refsource_REDHATThird Party Advisory | |
| https://access.redhat.com/security/cve/CVE-2017-12188 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1500380 | x_refsource_CONFIRMIssue TrackingPatchThird Party Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2017-12188 | ||
| https://patchwork.kernel.org/patch/9996579/ | x_refsource_CONFIRMIssue TrackingPatchVendor Advisory | |
| https://patchwork.kernel.org/patch/9996587/ | x_refsource_CONFIRMIssue TrackingPatchVendor Advisory | |
| https://www.cve.org/CVERecord?id=CVE-2017-12188 |
Change history (0)
No recorded changes yet.