AMD EPYC SMM denial of service

CVSS Meta Temp Score
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CTI Interest Score
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6.9$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in AMD EPYC. Affected is an unknown function of the component SMM. This manipulation causes denial of service. This vulnerability is registered as CVE-2021-46765. No exploit is available.

Detailsinfo

A vulnerability was found in AMD EPYC (version now known). It has been declared as problematic. Affected by this vulnerability is some unknown processing of the component SMM. The manipulation with an unknown input leads to a denial of service vulnerability. The CWE definition for the vulnerability is CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. As an impact it is known to affect availability. The summary by CVE is:

Insufficient input validation in ASP may allow an attacker with a compromised SMM to induce out-of-bounds memory reads within the ASP, potentially leading to a denial of service.

The weakness was published 05/09/2023. It is possible to read the advisory at amd.com. This vulnerability is known as CVE-2021-46765 since 03/31/2022. The technical details are unknown and an exploit is not publicly available.

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

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Productinfo

Vendor

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.9
VulDB Meta Temp Score: 6.9

VulDB Base Score: 5.7
VulDB Temp Score: 5.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CNA Base Score: 7.5
CNA Vector: 🔍

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Denial of service
CWE: CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

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

03/31/2022 🔍
05/09/2023 +404 days 🔍
05/09/2023 +0 days 🔍
01/27/2025 +629 days 🔍

Sourcesinfo

Advisory: amd.com
Status: Confirmed

CVE: CVE-2021-46765 (🔍)
GCVE (CVE): GCVE-0-2021-46765
GCVE (VulDB): GCVE-100-228535

Entryinfo

Created: 05/09/2023 23:47
Updated: 01/27/2025 19:31
Changes: 05/09/2023 23:47 (37), 06/02/2023 00:10 (11), 01/27/2025 19:31 (26)
Complete: 🔍
Cache ID: 216::103

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