CVE-2018-8934
The Promontory chipset, as used in AMD Ryzen and Ryzen Pro platforms, has a backdoor in firmware,...
The Promontory chipset, as used in AMD Ryzen and Ryzen Pro platforms, has a backdoor in firmware, aka CHIMERA-FW.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
The Promontory chipset, as used in AMD Ryzen and Ryzen Pro platforms, has a backdoor in firmware, aka CHIMERA-FW.
- Record
CVE-2018-8934- CVSS 3.0
- 9.0 Critical
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H - CVSS 2.0
- 9.3 High
AV:N/AC:M/Au:N/C:C/I:C/A:C - Updated
- 2026-11-02
CVE List No score
The Promontory chipset, as used in AMD Ryzen and Ryzen Pro platforms, has a backdoor in firmware, aka CHIMERA-FW.
- Record
CVE-2018-8934- Updated
- 2026-11-02
EUVDEUVD-2018-20542 No score
The Promontory chipset, as used in AMD Ryzen and Ryzen Pro platforms, has a backdoor in firmware, aka CHIMERA-FW.
- Record
EUVD-2018-20542- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-jf6h-g8vv-jx4q
The Promontory chipset, as used in AMD Ryzen and Ryzen Pro platforms, has a backdoor in firmware,...
The Promontory chipset, as used in AMD Ryzen and Ryzen Pro platforms, has a backdoor in firmware, aka CHIMERA-FW.
- Record
GHSA-jf6h-g8vv-jx4q- CVSS 3.0
- 9.0 Critical
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H - Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2018-8934 is a critical vulnerability (CVSS 9.0) in Amd Ryzen Firmware, published March 22, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.75%, the 77th percentile. No source names a fixed version.
References
amdflaws.com
blog.trailofbits.com/2018/03/15/amd-flaws-technical-summary
community.amd.com/community/amd-corporate/blog/2018/03/21/initial-amd-technical-assessment-of-cts-labs-research
safefirmware.com/amdflaws_whitepaper.pdf
nvd.nist.gov/vuln/detail/CVE-2018-8934
github.com/advisories/GHSA-jf6h-g8vv-jx4q