CVE-2023-31364 - Improper handling of direct memory writes in the input-output memory management unit could allow a malicious guest virtual machine (VM) to flood a host with writes, potentially causing a fatal machine check error resulting in denial of service

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HIGH

Improper handling of direct memory writes in the input-output memory management unit could allow a malicious guest virtual machine (VM) to flood a host with writes, potentially causing a fatal machine check error resulting in denial of service

Published Feb 26, 2026

8.3

HIGH

CVSS 4.0

EPSS 0.23%

Description

Improper handling of direct memory writes in the input-output memory management unit could allow a malicious guest virtual machine (VM) to flood a host with writes, potentially causing a fatal machine check error resulting in denial of service.

Affected products

Vendor AMD Product AMD Athlon™ 3000 Series Mobile Processors with Radeon™ Graphics Default
affected
Affected
- No Fix Planned
Vendor AMD Product AMD EPYC™ Embedded 8004 Series Processors Default
unaffected
Affected
- EmbGenoaPI-SP5 1.0.0.B
Vendor AMD Product AMD EPYC™ Embedded 9004 Series Processor Default
unaffected
Affected
- EmbGenoaPI-SP5 1.0.0.B
Vendor AMD Product AMD Ryzen™ 3000 Series Desktop Processors Default
affected
Affected
- No Fix Planned
Vendor AMD Product AMD Ryzen™ 3000 Series Mobile Processors with Radeon™ Graphics Default
affected
Affected
- No Fix Planned
Vendor AMD Product AMD Ryzen™ 4000 Series Mobile Processors with Radeon™ Graphics Default
affected
Affected
- No Fix Planned
Vendor AMD Product AMD Ryzen™ 5000 Series Mobile Processors with Radeon™ Graphics Default
affected
Affected
- No Fix Planned
Vendor AMD Product AMD Ryzen™ 6000 Series Processors with Radeon™ Graphics Default
affected
Affected
- No Fix Planned
Vendor AMD Product AMD Ryzen™ 7000 Series Desktop Processors Default
affected
Affected
- No Fix Planned
Vendor AMD Product AMD Ryzen™ 7020 Series Processors with Radeon™ Graphics Default
affected
Affected
- No Fix Planned
Vendor AMD Product AMD Ryzen™ 7040 Series Mobile Processors with Radeon™ Graphics Default
affected
Affected
- No Fix Planned
Vendor AMD Product AMD Ryzen™ 7045 Series Mobile Processors with Radeon™ Graphics Default
affected
Affected
- No Fix Planned
Vendor AMD Product AMD Ryzen™ 8000 Series Desktop Processors Default
affected
Affected
- No Fix Planned
Vendor AMD Product AMD Ryzen™ Embedded 5000 Series Processors Default
affected
Affected
- No Fix Planned
Vendor AMD Product AMD Ryzen™ Embedded 7000 Series Processors Default
affected
Affected
- No Fix Planned
Vendor AMD Product AMD Ryzen™ Embedded 8000 Series Processors Default
affected
Affected
- No Fix Planned
Vendor AMD Product AMD Ryzen™ Embedded R1000 Series Processors Default
affected
Affected
- No Fix Planned
Vendor AMD Product AMD Ryzen™ Embedded R2000 Series Processors Default
affected
Affected
- No Fix Planned
Vendor AMD Product AMD Ryzen™ Embedded V1000 Series Processors Default
affected
Affected
- No Fix Planned
Vendor AMD Product AMD Ryzen™ Embedded V2000 Series Processors Default
affected
Affected
- No Fix Planned
Vendor AMD Product AMD Ryzen™ Embedded V3000 Series Processors Default
affected
Affected
- No Fix Planned
Vendor AMD Product AMD Ryzen™ Threadripper™ PRO 3000 WX-Series Processors Default
affected
Affected
- No Fix Planned
Vendor AMD Product AMD Ryzen™ Threadripper™ PRO 5000 WX-Series Processors Default
affected
Affected
- No Fix Planned

Default status is the baseline for the product. Each version can override it (patched versions can be marked unaffected).

Vendor	Product	Default status	Versions
AMD	AMD Athlon™ 3000 Series Mobile Processors with Radeon™ Graphics	affected	Affected No Fix Planned
AMD	AMD EPYC™ Embedded 8004 Series Processors	unaffected	Affected EmbGenoaPI-SP5 1.0.0.B
AMD	AMD EPYC™ Embedded 9004 Series Processor	unaffected	Affected EmbGenoaPI-SP5 1.0.0.B
AMD	AMD Ryzen™ 3000 Series Desktop Processors	affected	Affected No Fix Planned
AMD	AMD Ryzen™ 3000 Series Mobile Processors with Radeon™ Graphics	affected	Affected No Fix Planned
AMD	AMD Ryzen™ 4000 Series Mobile Processors with Radeon™ Graphics	affected	Affected No Fix Planned
AMD	AMD Ryzen™ 5000 Series Mobile Processors with Radeon™ Graphics	affected	Affected No Fix Planned
AMD	AMD Ryzen™ 6000 Series Processors with Radeon™ Graphics	affected	Affected No Fix Planned
AMD	AMD Ryzen™ 7000 Series Desktop Processors	affected	Affected No Fix Planned
AMD	AMD Ryzen™ 7020 Series Processors with Radeon™ Graphics	affected	Affected No Fix Planned
AMD	AMD Ryzen™ 7040 Series Mobile Processors with Radeon™ Graphics	affected	Affected No Fix Planned
AMD	AMD Ryzen™ 7045 Series Mobile Processors with Radeon™ Graphics	affected	Affected No Fix Planned
AMD	AMD Ryzen™ 8000 Series Desktop Processors	affected	Affected No Fix Planned
AMD	AMD Ryzen™ Embedded 5000 Series Processors	affected	Affected No Fix Planned
AMD	AMD Ryzen™ Embedded 7000 Series Processors	affected	Affected No Fix Planned
AMD	AMD Ryzen™ Embedded 8000 Series Processors	affected	Affected No Fix Planned
AMD	AMD Ryzen™ Embedded R1000 Series Processors	affected	Affected No Fix Planned
AMD	AMD Ryzen™ Embedded R2000 Series Processors	affected	Affected No Fix Planned
AMD	AMD Ryzen™ Embedded V1000 Series Processors	affected	Affected No Fix Planned
AMD	AMD Ryzen™ Embedded V2000 Series Processors	affected	Affected No Fix Planned
AMD	AMD Ryzen™ Embedded V3000 Series Processors	affected	Affected No Fix Planned
AMD	AMD Ryzen™ Threadripper™ PRO 3000 WX-Series Processors	affected	Affected No Fix Planned
AMD	AMD Ryzen™ Threadripper™ PRO 5000 WX-Series Processors	affected	Affected No Fix Planned