AMD EPYC 4004 System Management Mode buffer underflow

CVSS Meta Temp Score
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CTI Interest Score
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4.0$0-$5k0.00

Summaryinfo

A vulnerability was found in AMD EPYC 4004, EPYC 4005, Ryzen 6000 Processors with Radeon Graphics, Ryzen 7040 Mobile Processors with Radeon Graphics, Ryzen 7045 Mobile Processors with Radeon Graphics, Ryzen 7000 Desktop Processors, Ryzen 9000HX Mobile Processors, Ryzen AI MAX, Ryzen AI 300 Processors, Ryzen Threadripper 7000 Processors, Ryzen Threadripper PRO 7000 WX-Series Processors, Ryzen 8000 Desktop Processors, Ryzen 9000 Desktop Processors, Ryzen Embedded V3000 Processors, Ryzen Embedded 7000 Processors, Ryzen Embedded 8000 Processors and Ryzen Embedded 9000 Processors. It has been declared as problematic. Affected is an unknown function of the component System Management Mode. Such manipulation leads to buffer underflow. This vulnerability is listed as CVE-2024-36343. The attack must be carried out locally. There is no available exploit. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in AMD EPYC 4004, EPYC 4005, Ryzen 6000 Processors with Radeon Graphics, Ryzen 7040 Mobile Processors with Radeon Graphics, Ryzen 7045 Mobile Processors with Radeon Graphics, Ryzen 7000 Desktop Processors, Ryzen 9000HX Mobile Processors, Ryzen AI MAX, Ryzen AI 300 Processors, Ryzen Threadripper 7000 Processors, Ryzen Threadripper PRO 7000 WX-Series Processors, Ryzen 8000 Desktop Processors, Ryzen 9000 Desktop Processors, Ryzen Embedded V3000 Processors, Ryzen Embedded 7000 Processors, Ryzen Embedded 8000 Processors and Ryzen Embedded 9000 Processors and classified as problematic. Affected by this issue is some unknown processing of the component System Management Mode. The manipulation with an unknown input leads to a buffer underflow vulnerability. Using CWE to declare the problem leads to CWE-124. The product writes to a buffer using an index or pointer that references a memory location prior to the beginning of the buffer. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Improper input validation in the System Management Mode (SMM) communications buffer could allow a privileged attacker to perform an out of bounds read or write to a limited section of the Top of Memory Segment (TSEG) memory region, potentially resulting in loss of confidentiality or integrity.

The advisory is shared for download at amd.com. This vulnerability is handled as CVE-2024-36343 since 05/23/2024. The exploitation is known to be easy. The attack needs to be approached locally. Additional levels of successful authentication are necessary for exploitation. There are neither technical details nor an exploit publicly available.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2024-55591). Once again VulDB remains the best source for vulnerability data.

Productinfo

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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: 4.2
VulDB Meta Temp Score: 4.0

VulDB Base Score: 4.2
VulDB Temp Score: 4.0
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: Buffer underflow
CWE: CWE-124 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Timelineinfo

05/23/2024 CVE reserved
05/19/2026 +726 days VulDB entry created
05/20/2026 +0 days Advisory disclosed
05/20/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: amd.com
Status: Confirmed

CVE: CVE-2024-36343 (🔒)
GCVE (CVE): GCVE-0-2024-36343
GCVE (VulDB): GCVE-100-364748
EUVD: 🔒

Entryinfo

Created: 05/20/2026 00:32
Updated: 05/20/2026 04:15
Changes: 05/20/2026 00:32 (65), 05/20/2026 04:15 (1)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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