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NVD / CVE Program· CNA AMD

CVE-2026-0438: A System Management Mode (SMM) handler could perform a callout to code located in non-SMM/untrusted memory.

Noroxi assessment

Priority: Monitor (action score 21/100)

  • 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: 0.13% (FIRST EPSS).
  • Physical access to the device is required. Administrator privileges are 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

A System Management Mode (SMM) handler could perform a callout to code located in non-SMM/untrusted memory. A highly privileged attacker could, with active user interaction and under high complexity and present preconditions, trigger execution of attacker-controlled code in SMM, potentially compromising the system’s confidentiality, integrity, and availability.

MediumCVSS 5.4 · v4.0—No exploit No fix recorded
Published
May 15, 2026
Updated
Oct 26, 2026
EPSS
0.1% · 3th percentile

Report tools

JSON

Action score

21

Monitor

Low priority for now.

CVSS
21 / 40 · 5.4 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · AMD
5.4
NVD has not scored this yet; the score shown is the CNA’s.

CVSS:4.0/AV:P/AC:H/AT:P/PR:H/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

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-2026-0438

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.

—

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 AMD EPYC™ 4004 Series Processors

    • ComboAM5PI 1.0.0.d / ComboAM5PI 1.1.0.3f / ComboAM5PI_1.2.0.3inot affected

  • AMD AMD EPYC™ 4005 Series Processors

    • ComboAM5PI_1.2.0.3inot affected

  • AMD AMD Ryzen™ 7000 Series Desktop Processors

    • ComboAM5PI 1.0.0.d, ComboAM5PI 1.1.0.3f, ComboAM5PI_1.2.0.3inot affected

  • AMD AMD Ryzen™ 7000 Series Desktop Processors (formerly codenamed "Raphael")

    • ComboAM5PI_1.3.0.0not affected

  • AMD AMD Ryzen™ 7040 Series Mobile Processors with Radeon™ Graphics

    • PhoenixPI-FP8-FP7_1.2.0.0fnot affected

  • AMD AMD Ryzen™ 7045 Series Mobile Processors with Radeon™ Graphics

    • DragonRangeFL1PI 1.0.0.3knot affected

  • AMD AMD Ryzen™ 8000 Series Desktop Processors

    • ComboAM5PI 1.1.0.3f, ComboAM5PI_1.2.0.3inot affected

  • AMD AMD Ryzen™ 8000 Series Desktop Processors (formerly codenamed "Phoenix")

    • ComboAM5PI_1.3.0.0not affected

  • AMD AMD Ryzen™ 8040 Series Mobile Processors with Radeon™ Graphics

    • PhoenixPI-FP8-FP7_1.2.0.0fnot affected

  • AMD AMD Ryzen™ 9000 Series Desktop Processors

    • ComboAM5PI_1.2.0.3inot affected

  • AMD AMD Ryzen™ 9000 Series Desktop Processors (formerly codenamed "Granite Ridge")

    • ComboAM5PI_1.3.0.0not affected

  • AMD AMD Ryzen™ 9000HX Series Processors

    • FireRangeFL1PI 1.0.0.0dnot affected

Same product

amd: all records

Other highest-scoring records for the same primary product.

  • CVE-2024-36326Missing authorization in AMD RomArmor could allow an attacker to bypass ROMArmor protections during system resume from a standby state, pote
    33Monitor
  • CVE-2025-48518Improper input validation in AMD Graphics Driver could allow a local attacker to write out of bounds, potentially resulting in loss of integ
    27Monitor
  • CVE-2025-0040Improper access control between the Joint Test Action Group (JTAG) and Advanced Extensible Interface (AXI) could allow an attacker with phys
    21Monitor

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.

No history yet (it accumulates with the daily EPSS job).

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

  • Physical access to the device is required.
  • Administrator privileges are required.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
Integrity
Availability
Attack vector
Physical
Attack complexity
High
Privileges required
High
User interaction
A
Scope
X

Weakness class (CWE)

CWE-1072 · Data Resource Access without Use of Connection Pooling

CVSS vector

CVSS:4.0/AV:P/AC:H/AT:P/PR:H/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

nvd-secondary

Attack context

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

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

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

References

Show all references (1 more)

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

All records