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NVD / CVE Program· CNA AMD

CVE-2021-46792: Time-of-check Time-of-use (TOCTOU) in the BIOS2PSP command may allow an attacker with a malicious BIOS to create a race condition causing th

Noroxi assessment

Priority: Monitor (action score 23/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.39% (FIRST EPSS).
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. Special conditions such as timing or configuration are required.
  • According to the record, no fixed version is available yet.

Low priority for now. Update when a fix is released; follow the vendor's advisory.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

Time-of-check Time-of-use (TOCTOU) in the BIOS2PSP command may allow an attacker with a malicious BIOS to create a race condition causing the ASP bootloader to perform out-of-bounds SRAM reads upon an S3 resume event potentially leading to a denial of service.

MediumCVSS 5.9 · v3.1—No exploit No fix recorded
Published
May 9, 2023
Updated
Jun 17, 2026
EPSS
0.3% · 33th percentile

Report tools

JSON

Action score

23

Monitor

Low priority for now.

CVSS
23 / 40 · 5.9 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.3%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • No fixed version yet

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2021-46792

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

We use this product, ask for help

Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
amdryzen 5300g firmware
amdryzen 5300g
amdryzen 5300ge firmware
amdryzen 5300ge
amdryzen 5500 firmware
amdryzen 5500
amdryzen 5600 firmware
amdryzen 5600
amdryzen 5600g firmware
amdryzen 5600g
amdryzen 5600ge firmware
amdryzen 5600ge

and 98 more

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • amd athlon gold 3150g firmwarepicassopi-fp5_1.0.0.4
  • amd athlon gold 3150ge firmwarepicassopi-fp5_1.0.0.4
  • amd athlon silver 3050ge firmwarepicassopi-fp5_1.0.0.4
  • amd ryzen 1200 (af) firmwarepinnaclepi-am4_1.0.0.7
  • amd ryzen 1200 (af) firmwareraven-fp5-am4_1.0.0.9
  • amd ryzen 1600 (af) firmwarepinnaclepi-am4_1.0.0.7
  • amd ryzen 1600 (af) firmwareraven-fp5-am4_1.0.0.9
  • amd ryzen 2200g firmwarepinnaclepi-am4_1.0.0.7
  • amd ryzen 2200g firmwareraven-fp5-am4_1.0.0.9
  • amd ryzen 2200ge firmwarepinnaclepi-am4_1.0.0.7
  • amd ryzen 2200ge firmwareraven-fp5-am4_1.0.0.9
  • amd ryzen 2300x firmwarepinnaclepi-am4_1.0.0.7
  • amd ryzen 2300x firmwareraven-fp5-am4_1.0.0.9
  • amd ryzen 2400g firmwarepinnaclepi-am4_1.0.0.7
  • amd ryzen 2400g firmwareraven-fp5-am4_1.0.0.9
  • amd ryzen 2400ge firmwarepinnaclepi-am4_1.0.0.7
  • amd ryzen 2400ge firmwareraven-fp5-am4_1.0.0.9
  • amd ryzen 2500x firmwarepinnaclepi-am4_1.0.0.7
  • amd ryzen 2500x firmwareraven-fp5-am4_1.0.0.9
  • amd ryzen 2600 firmwarepinnaclepi-am4_1.0.0.7

Versions reported by the vendor

Affected version ranges reported by the assigning authority (AMD). Independent of NVD's CPE analysis and usually ahead of it.

  • AMD Athlon™ 3000 Series Mobile Processors with Radeon™ Graphics “Dali”/”Dali” ULP

    • variousaffected

  • AMD Ryzen™ 2000 series Desktop Processors “Raven Ridge” AM4

    • variousaffected

  • AMD Ryzen™ 2000 Series Mobile Processors “Raven Ridge” FP5

    • variousaffected

  • AMD Ryzen™ 3000 Series Mobile processor, 2nd Gen AMD Ryzen™ Mobile Processors with Radeon™ Graphics “Picasso”

    • variousaffected

  • AMD Ryzen™ 3000 Series Mobile Processors with Radeon™ Graphics “Renoir”

    • variousaffected

  • AMD Ryzen™ 5000 Series Desktop processor with Radeon™ Graphics “Cezanne” AM4

    • Variousaffected

  • AMD Ryzen™ 5000 Series Mobile processors with Radeon™ Graphics “Cezanne”

    • variousaffected

  • AMD Ryzen™ 5000 Series Mobile Processors with Radeon™ Graphics “Lucienne”

    • variousaffected

Same product

amd: all records

Other highest-scoring records for the same primary product.

  • CVE-2021-46754Insufficient input validation in the ASP (AMD Secure Processor) bootloader may allow an attacker with a compromised Uapp or ABL to coerce th
    36Monitor
  • CVE-2021-46794Insufficient bounds checking in ASP (AMD Secure Processor) may allow for an out of bounds read in SMI (System Management Interface) mailbox
    30Monitor
  • CVE-2021-46749Insufficient bounds checking in ASP (AMD Secure Processor) may allow for an out of bounds read in SMI (System Management Interface) mailbox
    30Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2021-46759May 9, 2023 · Improper syscall input validation in AMD TEE (Trusted Execution Environment) may allow an attacker with physical access and control of a Uap
    24Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
High
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-367 · Time-of-check Time-of-use (TOCTOU) Race Condition

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records