AMD EPYC SVC_MAP_USER_STACK denial of service

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.6$0-$5k0.00

Summaryinfo

A vulnerability has been found in AMD EPYC and classified as problematic. Affected by this vulnerability is the function SVC_MAP_USER_STACK. Performing a manipulation results in denial of service. This vulnerability is known as CVE-2021-46756. No exploit is available.

Detailsinfo

A vulnerability was found in AMD EPYC (the affected version unknown). It has been classified as problematic. This affects the function SVC_MAP_USER_STACK. The manipulation with an unknown input leads to a denial of service vulnerability. CWE is classifying the issue as CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. This is going to have an impact on integrity, and availability. The summary by CVE is:

Insufficient validation of inputs in SVC_MAP_USER_STACK in the ASP (AMD Secure Processor) bootloader may allow an attacker with a malicious Uapp or ABL to send malformed or invalid syscall to the bootloader resulting in a potential denial of service and loss of integrity.

The weakness was published 05/09/2023. The advisory is shared at amd.com. This vulnerability is uniquely identified as CVE-2021-46756 since 03/31/2022. Technical details are known, but no exploit is available.

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

Vendor

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.6
VulDB Meta Temp Score: 7.6

VulDB Base Score: 4.6
VulDB Temp Score: 4.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.1
NVD Vector: 🔍

CNA Base Score: 9.1
CNA Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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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 🔍
01/28/2025 +630 days 🔍

Sourcesinfo

Advisory: amd.com
Status: Confirmed

CVE: CVE-2021-46756 (🔍)
GCVE (CVE): GCVE-0-2021-46756
GCVE (VulDB): GCVE-100-228525

Entryinfo

Created: 05/09/2023 23:46
Updated: 01/28/2025 18:11
Changes: 05/09/2023 23:46 (37), 01/28/2025 18:11 (35)
Complete: 🔍
Cache ID: 216::103

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