AMD CPU memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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5.0$0-$5k0.00

Summaryinfo

A vulnerability labeled as critical has been found in AMD CPU. This vulnerability affects unknown code. Executing a manipulation can lead to memory corruption. This vulnerability is registered as CVE-2021-26396. No exploit is available.

Detailsinfo

A vulnerability classified as critical was found in AMD CPU (Chip Software) (the affected version unknown). This vulnerability affects an unknown part. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Insufficient validation of address mapping to IO in ASP (AMD Secure Processor) may result in a loss of memory integrity in the SNP guest.

The weakness was published 01/11/2023. The advisory is available at amd.com. This vulnerability was named CVE-2021-26396 since 01/29/2021. The technical details are unknown and an exploit is not 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

Type

Vendor

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.0
VulDB Meta Temp Score: 5.0

VulDB Base Score: 5.5
VulDB Temp Score: 5.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 4.4
NVD Vector: 🔍

CVSSv2info

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

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

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

01/29/2021 🔍
01/11/2023 +712 days 🔍
01/11/2023 +0 days 🔍
04/09/2025 +819 days 🔍

Sourcesinfo

Advisory: amd.com
Status: Confirmed

CVE: CVE-2021-26396 (🔍)
GCVE (CVE): GCVE-0-2021-26396
GCVE (VulDB): GCVE-100-217990

Entryinfo

Created: 01/11/2023 14:53
Updated: 04/09/2025 20:39
Changes: 01/11/2023 14:53 (37), 02/01/2023 14:56 (11), 04/09/2025 20:39 (16)
Complete: 🔍
Cache ID: 216::103

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