The prepare_vmcs02 function in arch/x86/kvm/vmx.c in the Linux kernel through 4.13.3 does not ensure that the "CR8-load exiting" and "CR8-store exiting" L0 vmcs02 controls exist in cases where L1 omits the "use TPR shadow" vmcs12 control, which allows KVM L2 guest OS users to obtain read and write access to the hardware CR8 register.
CVE-2017-12154
“—” beside the score: it is equal to NVD's CVSS score.
Score 7.1 from GitHub Security Advisory (severity: HIGH) published 2022-05-13. NVD baseline CVSS 7.1; sources differ by 0.0.
- High severity, but no confirmed exploitation yet
A fix is available — apply it.
- CVSS v3
- 7.1
- EG Score
- 7.1HIGHmedium confidence
- EG Risk
- 32EG Risk 32/100
EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.
How it’s computed (value × EchelonGraph’s weight)Severity71% × 45%Impact severity (EG Severity): CVSS 7.1 of 10. Never the KEV-floored or EPSS-lifted EG Score.Exploitation0.5% × 40%FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.Automatability0% × 15%CISA's BOD 26-04 default: no one has published Automatable for this CVE, and CISA treats it as “no” for a CVE not in KEV.SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).Exploitation none (no CISA value, KEV listing or exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.Action: A fix is available. Apply it within your standard update timelines. - EPSS PROB
- 0.5%
- EPSS %ILE
- 42nd
- KEV
- Not listed
What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)
The EG score (7.1): severity, escalated by confirmed exploitation. This CVE's 7.1 is its impact severity (EG Severity), not escalated.
- EG Severity
- 7.1 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
- EG Likelihood
- 0.5% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-21). FIRST's exploitation probability, not an EchelonGraph model.
- Confirmed exploitation
- None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
- EG Priority
- SSVC Track at medium mission impactTrack at low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source: the SSVC and BOD 26-04 blocks below.
SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).
A fix is available. Apply it within your standard update timelines.
Exploitation none (no CISA value, KEV listing or exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table
BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.
In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). Where an input reads “CISA's BOD 26-04 default”, no one has published it for this CVE, and CISA's implementation guidance says: “If “Automatable” and “Technical Impact” information items about a CVE ID are not available and the CVE ID is not in the KEV Catalog, CISA will treat its values as “no” and “total,” respectively, until CISA or a third party provides metadata about the CVE ID. CISA will always provide the Vulnrichment data for a CVE ID listed in the KEV Catalog.” Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it
Published
September 26, 2017
Last Modified
June 17, 2026
Advisory Details (5)
Auto-updated Oct 22, 2026commit 51aa68e7d57e (torvalds/linux)
Fix landed in torvalds/linux commit 51aa68e7d57e — awaiting tagged release
https://github.com/torvalds/linux/commit/51aa68e7d57e3217192d88ce90fd5b8ef29ec94f1491224 – (CVE-2017-12154) CVE-2017-12154 Kernel: kvm: nVMX: L2 guest could access hardware(L0) CR8 register
Affected: Red Hat Enterprise Linux 5, 6, 7 and Red Hat Enterprise MRG 2.
https://bugzilla.redhat.com/show_bug.cgi?id=1491224Affected: Red Hat Enterprise Linux 7.
https://access.redhat.com/errata/RHSA-2018:0676kvm: nVMX: Don't allow L2 to access the hardware CR8 - kernel/git/torvalds/linux.git - Linux kernel source tree
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=51aa68e7d57e3217192d88ce90fd5b8ef29ec94fPatch Availability(8)
| Vendor / Ecosystem | Fix (by version range) / Patch | Released | Source |
|---|---|---|---|
| ubuntu | linux-image-extra-4.4.0-98-generic (4.4.0-98.121) @ xenial | 2026-05-22 | ubuntu |
| ubuntu | linux-image-extra-3.13.0-153-generic (3.13.0-153.203) @ trusty | 2026-05-22 | ubuntu |
| ubuntu | linux-image-raspi2 (4.13.0.1006.4) @ artful | 2026-05-22 | ubuntu |
| ubuntu | linux-image-extra-4.4.0-98-generic (4.4.0-98.121~14.04.1) @ trusty | 2026-05-22 | ubuntu |
| ubuntu | linux-image-generic-lts-trusty (3.13.0.153.143) @ precise | 2026-05-22 | ubuntu |
| redhat | kernel-0:3.10.0-693.55.1.el7 | 2019-07-30 | redhat |
| redhat | kernel-0:3.10.0-862.el7 | 2018-04-10 | redhat |
| redhat | kernel-rt-0:3.10.0-862.rt56.804.el7 | 2018-04-10 | redhat |
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
Affected Packages
(7 across 7 ecosystems)
Debian:11(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| linux | — |
| — |
Debian:12(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| linux | — |
| — |
Debian:13(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| linux | — |
| — |
Debian:14(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| linux | — |
| — |
Debian:7(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| linux | 3.2.41-2 ... 3.2.89-2 (67 versions) |
| — |
Debian:8(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| linux | 3.16.36-1 ... 3.16.7-ckt9-3~deb8u1~bpo70+1 (50 versions) |
| — |
Debian:9(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| linux | 4.9.30-2 ... 4.9.30-2+deb9u5~bpo8+1 (7 versions) |
| — |
All Vendor Advisories
(8)
Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.
- Red HatRHSA-2018:0676IMPORTANT2017-09-12
RHSA-2018:0676 — Important
- Red HatRHSA-2018:1062IMPORTANT2017-09-12
RHSA-2018:1062 — Important
- Red HatRHSA-2019:1946IMPORTANT2017-09-12
RHSA-2019:1946 — Important
- UbuntuUSN-3469-1MEDIUM
Linux kernel vulnerabilities
- UbuntuUSN-3469-2MEDIUM
Linux kernel (Xenial HWE) vulnerabilities
- UbuntuUSN-3487-1MEDIUM
Linux kernel vulnerabilities
- UbuntuUSN-3698-1MEDIUM
Linux kernel vulnerabilities
- UbuntuUSN-3698-2MEDIUM
Linux kernel (Trusty HWE) vulnerabilities
Data Freshness Timeline
(refreshed 11× in last 7d / 33× in last 30d)
Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.
Showing the most recent 94 of 175 refreshes on record for this CVE.
A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 6 repeat rows among the latest 100 are merged into the row they repeat. The 81 oldest rows on record are not shown and were not checked, so the counts can still include repeats.
- 2026-10-22 16:27 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
- 2026-10-22 06:28 UTCEG score recompute
- 2026-10-22 06:28 UTCVendor advisory
- 2026-10-22 06:28 UTCGHSA enrichmentGHSA-wjrh-v4vw-2jmc · GitHub severity HIGH · GitHub CVSS 7.1
- 2026-10-21 16:27 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
- 2026-10-20 16:27 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
- 2026-10-19 16:26 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
- 2026-10-18 16:26 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
- 2026-10-18 10:40 UTCEG score recompute
- 2026-10-17 16:27 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
- 2026-10-16 16:29 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
- 2026-10-15 16:26 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
- 2026-10-14 16:27 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
- 2026-10-13 16:27 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
- 2026-10-12 20:35 UTCEG score recompute
- 2026-10-12 16:28 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-10-12 00:59 UTCEG score recompute
- 2026-10-11 13:40 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-10-10 19:55 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-10-09 20:02 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-10-08 16:35 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-10-08 00:35 UTCOSV refresh
- 2026-10-07 23:41 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-10-06 15:11 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-10-05 17:38 UTCEPSS rescoreEPSS 0.5% · 41st percentile
Show 69 moreShow fewer
- 2026-10-04 23:18 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-10-03 14:21 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-09-30 14:58 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-09-30 09:23 UTCEG score recompute
- 2026-09-28 13:45 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-09-27 13:40 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-09-26 15:53 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-09-24 13:59 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-09-19 15:36 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
- 2026-09-18 19:22 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
- 2026-09-18 06:36 UTCOSV refresh
- 2026-09-17 19:22 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
- 2026-09-15 03:05 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
- 2026-09-13 16:42 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
- 2026-09-12 14:55 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
- 2026-09-11 09:31 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
- 2026-09-10 09:26 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-09-07 15:56 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-09-04 13:56 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-09-04 05:01 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-09-02 14:07 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-09-01 13:48 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-09-01 03:31 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-08-30 19:13 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-08-30 07:00 UTCOSV refresh
- 2026-08-28 21:36 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-08-27 14:20 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-08-26 14:41 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-08-25 13:44 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-08-24 14:10 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-08-21 23:44 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-08-20 22:50 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-08-19 16:59 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-08-18 13:43 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-08-17 13:42 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-08-16 14:51 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-08-16 02:10 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-08-15 01:26 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-08-13 22:34 UTCOSV refresh
- 2026-08-13 21:56 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-08-09 13:42 UTCEPSS rescoreEPSS 0.5% · 40th percentile
- 2026-08-08 16:32 UTCEPSS rescoreEPSS 0.5% · 40th percentile
- 2026-08-07 16:22 UTCEPSS rescoreEPSS 0.5% · 40th percentile
- 2026-08-06 13:42 UTCEPSS rescoreEPSS 0.5% · 40th percentile
- 2026-08-05 19:12 UTCEPSS rescoreEPSS 0.5% · 40th percentile
- 2026-08-04 15:05 UTCEPSS rescoreEPSS 0.5% · 40th percentile
- 2026-08-04 10:32 UTCEPSS rescoreEPSS 0.5% · 40th percentile
- 2026-08-03 10:30 UTCEPSS rescoreEPSS 0.5% · 40th percentile
- 2026-08-02 02:23 UTCEPSS rescoreEPSS 0.5% · 40th percentile
- 2026-08-01 04:11 UTCEPSS rescoreEPSS 0.5% · 40th percentile
- 2026-07-30 16:24 UTCEPSS rescoreEPSS 0.5% · 40th percentile
- 2026-07-30 01:26 UTCEPSS rescoreEPSS 0.5% · 40th percentile
- 2026-07-29 01:17 UTCOSV refresh
- 2026-07-28 15:32 UTCEPSS rescoreEPSS 0.5% · 40th percentile
- 2026-07-26 14:51 UTCEPSS rescoreEPSS 0.5% · 40th percentile
- 2026-07-25 14:13 UTCEPSS rescoreEPSS 0.5% · 40th percentile
- 2026-07-23 14:15 UTCEPSS rescoreEPSS 0.5% · 40th percentile
- 2026-07-23 01:26 UTCEG score recompute
- 2026-07-22 22:05 UTCEG score recompute
- 2026-07-22 14:04 UTCEPSS rescoreEPSS 0.5% · 40th percentile
- 2026-07-21 15:21 UTCEPSS rescoreEPSS 0.5% · 40th percentile
- 2026-07-20 17:04 UTCEPSS rescoreEPSS 0.5% · 40th percentile
- 2026-07-19 14:28 UTCEPSS rescoreEPSS 0.5% · 40th percentile
- 2026-07-19 02:26 UTCEPSS rescoreEPSS 0.5% · 40th percentile
- 2026-07-18 10:00 UTCEPSS rescoreEPSS 0.5% · 40th percentile
- 2026-07-16 16:59 UTCEPSS rescoreEPSS 0.5% · 40th percentile
- 2026-07-15 16:54 UTCEPSS rescoreEPSS 0.5% · 40th percentile
- 2026-07-15 01:56 UTCEPSS rescoreEPSS 0.5% · 40th percentile
- 2026-07-13 22:26 UTCEPSS rescoreEPSS 0.5% · 40th percentile
Related CVEs(same product + same vendor)
Same product
10 shownDebian:7:linux
Same vendor
10 shownredhat:RHSA-2018:0676 · ubuntu:USN-3469-1
Frequently asked(5)
What is CVE-2017-12154?
When was CVE-2017-12154 made public?
Is CVE-2017-12154 actively exploited?
What is the CVSS score of CVE-2017-12154?
How do I remediate CVE-2017-12154?
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2017-12154
Is Your Infrastructure Affected by CVE-2017-12154?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.