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Fencer Vulns
medium 5.4

CVE-2026-0438 json

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

published 2026-05-15 5 mo ago modified 2026-10-26 13 d ago also EUVD-2026-30496

cvss
5.4
version 4.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.1%
EPSS 0.1% chance of exploitation in 30 days, percentile 3%
public exploits
0
none known

Summary

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.

Patch / fix

  • AMD AMD Ryzen™ 7040 Series Mobile Processors with Radeon™ Graphics PhoenixPI-FP8-FP7_1.2.0.0f
  • AMD AMD Ryzen™ 7045 Series Mobile Processors with Radeon™ Graphics DragonRangeFL1PI 1.0.0.3k
  • AMD AMD Ryzen™ 7000 Series Desktop Processors ComboAM5PI 1.0.0.d, ComboAM5PI 1.1.0.3f, ComboAM5PI_1.2.0.3i
  • AMD AMD Ryzen™ 9000HX Series Processors FireRangeFL1PI 1.0.0.0d
  • AMD AMD Ryzen™ AI 300 Series Processors StrixKrackanPI-FP8_1.1.0.0e
  • AMD AMD Ryzen™ Threadripper™ PRO 7000 WX-Series Processors ShimadaPeakPI-SP6 1.0.0.1c, StormPeakPI-SP6 1.0.0.1m, StormPeakPI-SP6_1.1.0.0k
  • AMD AMD Ryzen™ 8000 Series Desktop Processors ComboAM5PI 1.1.0.3f, ComboAM5PI_1.2.0.3i
  • AMD AMD Ryzen™ 9000 Series Desktop Processors ComboAM5PI_1.2.0.3i
  • AMD AMD Ryzen™ 8040 Series Mobile Processors with Radeon™ Graphics PhoenixPI-FP8-FP7_1.2.0.0f
  • AMD AMD Ryzen™ AI Max 300 Series Processors StrixHaloPI-FP11_1.0.0.2a
  • AMD AMD Ryzen™ Z1 Series Processors PhoenixPI-FP8-FP7_1.2.0.0f
  • AMD AMD Ryzen™ Z2 Series Processors Extreme StrixKrackanPI-FP8_1.1.0.2d
  • AMD AMD Ryzen™ Z2 Series Processors PhoenixPI-FP8-FP7_1.2.0.0f
  • AMD AMD Ryzen™ Threadripper™ 7000 Processors ShimadaPeakPI-SP6 1.0.0.1c
  • AMD AMD Ryzen™ Threadripper™ 9000 Processors ShimadaPeakPI-SP6 1.0.0.1c
  • AMD AMD Ryzen™ Threadripper™ PRO 9000 WX-Series Processors ShimadaPeakPI-SP6 1.0.0.1c
  • AMD AMD Ryzen™ 7000 Series Desktop Processors (formerly codenamed "Raphael") ComboAM5PI_1.3.0.0
  • AMD AMD Ryzen™ 8000 Series Desktop Processors (formerly codenamed "Phoenix") ComboAM5PI_1.3.0.0
  • AMD AMD Ryzen™ 9000 Series Desktop Processors (formerly codenamed "Granite Ridge") ComboAM5PI_1.3.0.0
  • AMD AMD Ryzen™ Embedded 9000 Series Processors EmbeddedAM5PI 1.0.0.5
  • AMD AMD Ryzen™ Embedded 8000 Series Processors EmbeddedPhoenixPI-FP7r2_1.0.0.4
  • AMD AMD Ryzen™ Embedded 7000 Series Processors EmbeddedAM5PI 1.0.0.5
  • AMD AMD EPYC™ 4004 Series Processors ComboAM5PI 1.0.0.d / ComboAM5PI 1.1.0.3f / ComboAM5PI_1.2.0.3i
  • AMD AMD EPYC™ 4005 Series Processors ComboAM5PI_1.2.0.3i

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
5 mo ago

Exploit prediction

0.14% chance of exploitation in the next 30 days, higher than 3% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 4.0 5.4 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
CNA 4.0 5.4 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

Affected products

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

Classification

Weakness
  • CWE-1072 Data Resource Access without Use of Connection Pooling

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.