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Vulnerability · Published May 15, 2026 · Assigned by AMD

CVE-2026-0438

Medium 5.4

In plain English

A medium-severity security flaw in AMD EPYC™ 4004 Series Processors from AMD. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 3% of all known vulnerabilities).

Severity (CVSS 4.0)5.4Medium
Exploit odds (30 days)0.1%top 96.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

VendorProductVersions
AMD AMD Ryzen™ 7040 Series Mobile Processors with Radeon™ Graphics see references
AMD AMD Ryzen™ 7045 Series Mobile Processors with Radeon™ Graphics see references
AMD AMD Ryzen™ 7000 Series Desktop Processors see references
AMD AMD Ryzen™ 9000HX Series Processors see references
AMD AMD Ryzen™ AI 300 Series Processors see references
AMD AMD Ryzen™ Threadripper™ PRO 7000 WX-Series Processors see references
AMD AMD Ryzen™ 7000 Series Desktop Processors see references
AMD AMD Ryzen™ 7000 Series Desktop Processors see references
AMD AMD Ryzen™ 8000 Series Desktop Processors see references
AMD AMD Ryzen™ 8000 Series Desktop Processors see references
AMD AMD Ryzen™ 9000 Series Desktop Processors see references
AMD AMD Ryzen™ 8040 Series Mobile Processors with Radeon™ Graphics see references
AMD AMD Ryzen™ AI Max 300 Series Processors see references
AMD AMD Ryzen™ Z1 Series Processors see references
AMD AMD Ryzen™ Z1 Series Processors see references
AMD AMD Ryzen™ Z2 Series Processors Extreme see references
AMD AMD Ryzen™ Z2 Series Processors see references
AMD AMD Ryzen™ Threadripper™ PRO 7000 WX-Series Processors see references
AMD AMD Ryzen™ Threadripper™ 7000 Processors see references
AMD AMD Ryzen™ Threadripper™ 9000 Processors see references
AMD AMD Ryzen™ Threadripper™ PRO 9000 WX-Series Processors see references
AMD AMD Ryzen™ 7000 Series Desktop Processors (formerly codenamed "Raphael") see references
AMD AMD Ryzen™ 8000 Series Desktop Processors (formerly codenamed "Phoenix") see references
AMD AMD Ryzen™ 9000 Series Desktop Processors (formerly codenamed "Granite Ridge") see references
AMD AMD Ryzen™ Embedded 9000 Series Processors see references
AMD AMD Ryzen™ Embedded 8000 Series Processors see references
AMD AMD Ryzen™ Embedded 7000 Series Processors see references
AMD AMD EPYC™ 4004 Series Processors see references
AMD AMD EPYC™ 4005 Series Processors see references

Weakness: CWE-1072 · 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

References