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NVD / CVE Program· CNA AMD

CVE-2021-26368: Insufficient check of the process type in Trusted OS (TOS) may allow an attacker with privileges to enable a lesser privileged process to…

MediumCVSS 4.4 · v3.1—No exploit No fix recorded

Noroxi assessment

Priority: Monitor (action score 17/100)

  • 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: 0.14% (FIRST EPSS).
  • Someone with local access to the system can trigger it. Administrator privileges are required. No user action is required. No special conditions are required; it is repeatable.
  • 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

Insufficient check of the process type in Trusted OS (TOS) may allow an attacker with privileges to enable a lesser privileged process to unmap memory owned by a higher privileged process resulting in a denial of service.

Published
May 12, 2022
Updated
Jun 16, 2026
EPSS
0.1% · 3th percentile

Report tools

JSON

Action score

17

Monitor

Low priority for now.

CVSS
17 / 40 · 4.4 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

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-2021-26368

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.

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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 3 2200u firmware
amdryzen 3 2200u
amdryzen 3 2300u firmware
amdryzen 3 2300u
amdryzen 3 3100 firmware
amdryzen 3 3100
amdryzen 3 3300g firmware
amdryzen 3 3300g
amdryzen 3 3300x firmware
amdryzen 3 3300x
amdryzen 3 5125c firmware
amdryzen 3 5125c

and 128 more

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™ Series

    • variousaffected

  • AMD Ryzen™ Series

    • variousaffected
Affected versions · NVD (20)

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

  • amd ryzen 3 2200u firmwareall versions
  • amd ryzen 3 2300u firmwareall versions
  • amd ryzen 3 3100 firmwareall versions
  • amd ryzen 3 3300g firmwareall versions
  • amd ryzen 3 3300x firmwareall versions
  • amd ryzen 3 5125c firmwareall versions
  • amd ryzen 3 5400u firmwareall versions
  • amd ryzen 3 5425c firmwareall versions
  • amd ryzen 3 5425u firmwareall versions
  • amd ryzen 5 2500u firmwareall versions
  • amd ryzen 5 2600 firmwareall versions
  • amd ryzen 5 2600h firmwareall versions
  • amd ryzen 5 2600x firmwareall versions
  • amd ryzen 5 3400g firmwareall versions
  • amd ryzen 5 3450g firmwareall versions
  • amd ryzen 5 3600 firmwareall versions
  • amd ryzen 5 3600x firmwareall versions
  • amd ryzen 5 5560u firmwareall versions
  • amd ryzen 5 5600h firmwareall versions
  • amd ryzen 5 5600hs firmwareall versions

Same product

amd: all records

Other highest-scoring records for the same primary product.

  • CVE-2021-26386A malicious or compromised UApp or ABL may be used by an attacker to issue a malformed system call to the Stage 2 Bootloader potentially…
    31Monitor

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.

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • Administrator privileges are required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

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

Weakness class (CWE)

CWE-345 · Insufficient Verification of Data Authenticity

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:H/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.

References

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

All records