CVE-2026-0438
A System Management Mode (SMM) handler could perform a callout to code located in non-SMM...
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.
Attack profile
How easy it is to exploit
- Attack vector
- Physical
- Complexity
- High
- Privileges needed
- High
- User interaction
- Active
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
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.
- Record
CVE-2026-0438- CVSS 4.0
- 5.4 Medium
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 - Weakness
- CWE-1072
- Updated
- 2026-11-02
EUVDEUVD-2026-30496
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.
- Record
EUVD-2026-30496- CVSS 4.0
- 5.4 Medium
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 - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-783m-hm3h-gh75
A System Management Mode (SMM) handler could perform a callout to code located in non-SMM...
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.
- Record
GHSA-783m-hm3h-gh75- CVSS 4.0
- 5.4 Medium
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 - Weakness
- CWE-1072
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2026-0438- CVSS 4.0
- 5.4 Medium
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 - Weakness
- CWE-1072
- Updated
- 2026-11-02
Affected products
- amd epyc™ 4004 series processors
- amd epyc™ 4005 series processors
- amd ryzen™ 7000 series desktop processors
- amd ryzen™ 7000 series desktop processors (formerly codenamed "raphael")
- amd ryzen™ 7040 series mobile processors with radeon™ graphics
- amd ryzen™ 7045 series mobile processors with radeon™ graphics
- amd ryzen™ 8000 series desktop processors
- amd ryzen™ 8000 series desktop processors (formerly codenamed "phoenix")
- amd ryzen™ 8040 series mobile processors with radeon™ graphics
- amd ryzen™ 9000 series desktop processors
- amd ryzen™ 9000 series desktop processors (formerly codenamed "granite ridge")
- amd ryzen™ 9000hx series processors
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- amd ryzen™ ai 300 series processors
- amd ryzen™ ai max 300 series processors
- amd ryzen™ embedded 7000 series processors
- amd ryzen™ embedded 8000 series processors
- amd ryzen™ embedded 9000 series processors
- amd ryzen™ threadripper™ 7000 processors
- amd ryzen™ threadripper™ 9000 processors
- amd ryzen™ threadripper™ pro 7000 wx-series processors
- amd ryzen™ threadripper™ pro 9000 wx-series processors
- amd ryzen™ z1 series processors
- amd ryzen™ z2 series processors
- amd ryzen™ z2 series processors extreme
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-0438 is a medium vulnerability (CVSS 5.4) in Amd Epyc™ 4004 Series Processors, published May 15, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.14%, the 3rd percentile. No source names a fixed version.