CVE-2021-46754
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedInsufficient input validation in the ASP (AMD Secure Processor) bootloader may allow an attacker with a compromised Uapp or ABL to coerce the bootloader into exposing sensitive information to the SMU (System Management Unit) resulting in a potential loss of confidentiality and integrity.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceInsufficient input validation in the AMD Secure Processor (ASP) bootloader allows an attacker with a compromised Uapp or ABL (firmware components) to manipulate the bootloader to expose sensitive information to the System Management Unit (SMU), resulting in confidentiality and integrity loss.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data= cezannepi-fp6_1.0.0.6= cezannepi-fp6_1.0.0.6= cezannepi-fp6_1.0.0.6= cezannepi-fp6_1.0.0.6= cezannepi-fp6_1.0.0.6= cezannepi-fp6_1.0.0.6= cezannepi-fp6_1.0.0.6= cezannepi-fp6_1.0.0.6CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify your AMD Ryzen processor modelRun 'wmic cpu get name' on Windows or 'cat /proc/cpuinfo | grep "model name"' on Linux to list the processor modelAffected if The processor is one of: Ryzen 5300g, 5300ge, 5500, 5600, 5600g, 5600ge, 5600x, or 5700g
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Check AMD Secure Processor firmware versionAccess BIOS/UEFI settings on system boot and look for AMD Secure Processor (ASP) or Platform Security Processor firmware version information, or use AMD's hardware diagnostic tools if availableAffected if The ASP firmware version is cezannepi-fp6_1.0.0.6
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Verify Uapp component integrityInspect Uapp firmware integrity through BIOS diagnostics, secure boot logs, or AMD-specific firmware validation tools that can verify the Unified Application (Uapp) component has not been tampered withAffected if Uapp component shows signs of unauthorized modification or compromise
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Verify ABL component integrityInspect ABL (AMD Boot Loader) firmware integrity through BIOS diagnostics, secure boot logs, or platform integrity measurement logs that can verify the ABL component has not been tampered withAffected if ABL component shows signs of unauthorized modification or compromise
You are affected if you have one of the listed Ryzen processors running ASP firmware version cezannepi-fp6_1.0.0.6 AND the Uapp or ABL firmware components are compromised (the vulnerability requires a compromised Uapp or ABL to exploit the bootloader input validation flaw).
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataApply AMD-provided firmware/BIOS updates for the ASP bootloader once released; prior to patching, ensure platform integrity by verifying no unauthorized firmware modifications exist in Uapp/ABL components.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA4.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $6,176.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-46754 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2021-46754 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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