AMD EPYC 4004 Processors IOMMU out-of-bounds

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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10.0$0-$5k0.00+

Summaryinfo

A vulnerability identified as very critical has been detected in AMD EPYC 4004 Processors, EPYC 4005 Processors, EPYC 7001 Processors, EPYC 7002 Processors, EPYC 7003 Processors, EPYC 8004 Processors, EPYC 8005 Processors, EPYC 9004 Processors, EPYC 9005 Processors, EPYC Embedded 3000 Processors, EPYC Embedded 7002 Processors, EPYC Embedded 7003 Processors, EPYC Embedded 8004 Processors, EPYC Embedded 9004 Processors, EPYC Embedded 9005 Processors, Ryzen 2000 Mobile Processors, Ryzen 4000 Desktop Processors, Ryzen 4000 Mobile Processors with Radeon Graphics, Ryzen 5000 Desktop Processors, Ryzen 5000 Mobile Processors with Radeon Graphics, Ryzen 6000 Processors with Radeon Graphics, Ryzen 7000 Desktop Processors, Ryzen 7020 Processors with Radeon Graphics, Ryzen 7040 Mobile Processors with Radeon Graphics, Ryzen 7045 Mobile Processors with Radeon Graphics, Ryzen 8000 Desktop Processors, Ryzen 8040 Mobile Processors with Radeon Graphics, Ryzen 9000 Desktop Processors, Ryzen 9000HX Processors, Ryzen AI 300 Processors, Ryzen AI Max 300 Processors, Ryzen Embedded 5000 Processors, Ryzen Embedded 7000 Processors, Ryzen Embedded 8000 Processors, Ryzen Embedded V2000 Processors, Ryzen Embedded V2000A Processors, Ryzen Embedded V3000 Processors, Ryzen Embedded V3000 EDKII Processors, Ryzen Threadripper 7000 WX-Series Processors, Ryzen Threadripper 9000, Ryzen Threadripper PRO 3000 WX-Series Processors, Ryzen Threadripper PRO 5000 WX-Series Processors, Ryzen Threadripper PRO 7000 WX-Series Processors, Ryzen Z1 Processors and Ryzen Z2 Processors. Affected is an unknown function of the component IOMMU. This manipulation causes out-of-bounds. This vulnerability is handled as CVE-2024-21963. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability classified as very critical was found in AMD EPYC 4004 Processors, EPYC 4005 Processors, EPYC 7001 Processors, EPYC 7002 Processors, EPYC 7003 Processors, EPYC 8004 Processors, EPYC 8005 Processors, EPYC 9004 Processors, EPYC 9005 Processors, EPYC Embedded 3000 Processors, EPYC Embedded 7002 Processors, EPYC Embedded 7003 Processors, EPYC Embedded 8004 Processors, EPYC Embedded 9004 Processors, EPYC Embedded 9005 Processors, Ryzen 2000 Mobile Processors, Ryzen 4000 Desktop Processors, Ryzen 4000 Mobile Processors with Radeon Graphics, Ryzen 5000 Desktop Processors, Ryzen 5000 Mobile Processors with Radeon Graphics, Ryzen 6000 Processors with Radeon Graphics, Ryzen 7000 Desktop Processors, Ryzen 7020 Processors with Radeon Graphics, Ryzen 7040 Mobile Processors with Radeon Graphics, Ryzen 7045 Mobile Processors with Radeon Graphics, Ryzen 8000 Desktop Processors, Ryzen 8040 Mobile Processors with Radeon Graphics, Ryzen 9000 Desktop Processors, Ryzen 9000HX Processors, Ryzen AI 300 Processors, Ryzen AI Max 300 Processors, Ryzen Embedded 5000 Processors, Ryzen Embedded 7000 Processors, Ryzen Embedded 8000 Processors, Ryzen Embedded V2000 Processors, Ryzen Embedded V2000A Processors, Ryzen Embedded V3000 Processors, Ryzen Embedded V3000 EDKII Processors, Ryzen Threadripper 7000 WX-Series Processors, Ryzen Threadripper 9000, Ryzen Threadripper PRO 3000 WX-Series Processors, Ryzen Threadripper PRO 5000 WX-Series Processors, Ryzen Threadripper PRO 7000 WX-Series Processors, Ryzen Z1 Processors and Ryzen Z2 Processors. Affected by this vulnerability is some unknown functionality of the component IOMMU. The manipulation with an unknown input leads to a out-of-bounds vulnerability. The CWE definition for the vulnerability is CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

An out-of-bounds read vulnerability in the IOMMU could allow a malicious guest to corrupt hypervisor (HV) pages and potentially cause a host crash leading to loss of availability.

The advisory is shared at amd.com. This vulnerability is known as CVE-2024-21963 since 01/03/2024. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 11/12/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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Vendor

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License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 10.0
VulDB Meta Temp Score: 10.0

VulDB Base Score: 10.0
VulDB Temp Score: 10.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Out-of-bounds
CWE: CWE-125 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

01/03/2024 CVE reserved
11/12/2026 +1044 days Advisory disclosed
11/12/2026 +0 days VulDB entry created
11/12/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: amd.com
Status: Confirmed

CNA: AMD
CVE: CVE-2024-21963 (🔒)

GCVE (CVE): GCVE-0-2024-21963
GCVE (VulDB): GCVE-100-436501

Entryinfo

Created: 11/12/2026 20:51
Changes: 11/12/2026 20:51 (64)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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