CRITICAL
The Promontory chipset, as used in AMD Ryzen and Ryzen Pro platforms, has a backdoor in the ASIC, aka CHIMERA-HW
Published Mar 22, 2018
9.0
CRITICALCVSS 3.0
EPSS 1.75%
Description
The Promontory chipset, as used in AMD Ryzen and Ryzen Pro platforms, has a backdoor in the ASIC, aka CHIMERA-HW.
Affected products
No data.
Configuration 1
AND
- n/a
Configuration 2
AND
- n/a
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
9.0 CRITICAL NVD
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Attack Vector Network
Attack Complexity High
Privileges Required None
User Interaction None
Scope Changed
Confidentiality Impact High
Integrity Impact High
Availability Impact High
9.3 HIGH NVD
AV:N/AC:M/Au:N/C:C/I:C/A:C
Access Vector Network
Access Complexity Medium
Authentication None
Confidentiality Impact Complete
Integrity Impact Complete
Availability Impact Complete
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
1.75% 0.01750
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.01750
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Table of values (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.75% (0.01750) | 77.02th | v5 (v2026.06.15) |
| Sep 20, 2026 | 1.75% (0.01750) | 76.83th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.36% (0.00361) | 72.53th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.36% (0.00361) | 71.48th | v3 (v2023.03.01) |
| Sep 3, 2023 | 0.36% (0.00361) | 68.78th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.29% (0.00290) | 64.08th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.02% (0.01018) | 40.69th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.02% (0.01018) | 19.50th | v2 (v2022.01.01) |
| Feb 3, 2022 | 1.04% (0.01040) | 28.32th | v5 (v2026.06.15) |
| Apr 14, 2021 | 1.04% (0.01040) | 0.00th | v1 |
Weaknesses (0)
No CWE recorded.
References (4)
- https://amdflaws.com/ x_refsource_MISCThird Party Advisory
- https://blog.trailofbits.com/2018/03/15/amd-flaws-technical-summary/ x_refsource_MISCThird Party Advisory
- https://community.amd.com/community/amd-corporate/blog/2018/03/21/initial-amd-technical-assessment-of-cts-labs-research x_refsource_MISCVendor Advisory
- https://safefirmware.com/amdflaws_whitepaper.pdf x_refsource_MISCThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| https://amdflaws.com/ | x_refsource_MISCThird Party Advisory | |
| https://blog.trailofbits.com/2018/03/15/amd-flaws-technical-summary/ | x_refsource_MISCThird Party Advisory | |
| https://community.amd.com/community/amd-corporate/blog/2018/03/21/initial-amd-technical-assessment-of-cts-labs-research | x_refsource_MISCVendor Advisory | |
| https://safefirmware.com/amdflaws_whitepaper.pdf | x_refsource_MISCThird Party Advisory |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Mar 22, 2018
Updated Aug 5, 2024
Reserved Mar 22, 2018
Link CVE-2018-8935
CISA Vulnrichment
Updated n/a