AMD Ryzen 3000 Desktop Processors timing discrepancy

CVSS Meta Temp Score
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CTI Interest Score
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1.9$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic was found in AMD Ryzen 3000 Desktop Processors, Ryzen 5000 Desktop Processors, Ryzen Threadripper 3000 Processors, Ryzen Threadripper PRO 3000WX Processors and Ryzen Threadripper PRO 5000 WX-Series Processors. Impacted is an unknown function. Such manipulation leads to timing discrepancy. This vulnerability is uniquely identified as CVE-2023-20540. Local access is required to approach this attack. No exploit exists.

Detailsinfo

A vulnerability was found in AMD Ryzen 3000 Desktop Processors, Ryzen 5000 Desktop Processors, Ryzen Threadripper 3000 Processors, Ryzen Threadripper PRO 3000WX Processors and Ryzen Threadripper PRO 5000 WX-Series Processors. It has been rated as problematic. Affected by this issue is an unknown function. The manipulation with an unknown input leads to a timing discrepancy vulnerability. Using CWE to declare the problem leads to CWE-208. Two separate operations in a product require different amounts of time to complete, in a way that is observable to an actor and reveals security-relevant information about the state of the product, such as whether a particular operation was successful or not. Impacted is confidentiality. CVE summarizes:

An observable timing discrepancy in the ASP could allow a privileged attacker to perform a brute-force attack against the hash message authentication code, allowing arbitrary message input, potentially leading to a loss of data integrity.

The advisory is shared for download at amd.com. This vulnerability is handled as CVE-2023-20540 since 10/27/2022. The exploitation is known to be difficult. The attack needs to be approached locally. Additional levels of successful authentication are required for exploitation. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1592.

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

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2023-60597). VulDB is the best source for vulnerability data and more expert information about this specific topic.

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: 1.9
VulDB Meta Temp Score: 1.9

VulDB Base Score: 1.9
VulDB Temp Score: 1.9
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: Timing discrepancy
CWE: CWE-208 / CWE-203 / CWE-200
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: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

10/27/2022 CVE reserved
06/26/2026 +1338 days Advisory disclosed
06/26/2026 +0 days VulDB entry created
06/26/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: amd.com
Status: Confirmed

CVE: CVE-2023-20540 (🔒)
GCVE (CVE): GCVE-0-2023-20540
GCVE (VulDB): GCVE-100-374192
EUVD: 🔒

Entryinfo

Created: 06/26/2026 18:35
Updated: 06/26/2026 19:56
Changes: 06/26/2026 18:35 (63), 06/26/2026 19:56 (1)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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