AMD EPYC 7003 Processors access of memory location after end of buffer

CVSS Meta Temp Score
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CTI Interest Score
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3.0$0-$5k0.00

Summaryinfo

A vulnerability has been found in AMD EPYC 7003 Processors, EPYC 9004 Processors, EPYC Embedded 7003 Processors and EPYC Embedded 9004 Processors and classified as problematic. This issue affects some unknown processing. This manipulation causes access of memory location after end of buffer. This vulnerability is registered as CVE-2023-20585. The attack needs to be launched locally. No exploit is available.

Detailsinfo

A vulnerability was found in AMD EPYC 7003 Processors, EPYC 9004 Processors, EPYC Embedded 7003 Processors and EPYC Embedded 9004 Processors (the affected version unknown). It has been declared as problematic. Affected by this vulnerability is an unknown part. The manipulation with an unknown input leads to a access of memory location after end of buffer vulnerability. The CWE definition for the vulnerability is CWE-788. The product reads or writes to a buffer using an index or pointer that references a memory location after the end of the buffer. As an impact it is known to affect integrity, and availability. The summary by CVE is:

Insufficient checks of the RMP on host buffer access in IOMMU may allow an attacker with privileges and a compromised hypervisor to trigger an out of bounds condition without RMP checks, resulting in a potential loss of confidential guest integrity.

It is possible to read the advisory at amd.com. This vulnerability is known as CVE-2023-20585 since 10/27/2022. The exploitation appears to be difficult. Attacking locally is a requirement. The exploitation requires an enhanced level of successful authentication. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 307593 (Linux Distros Unpatched Vulnerability : CVE-2023-20585), which helps to determine the existence of the flaw in a target environment.

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 databases at Tenable (307593) and EUVD (EUVD-2023-24764). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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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: 3.0
VulDB Meta Temp Score: 3.0

VulDB Base Score: 3.0
VulDB Temp Score: 3.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Access of memory location after end of buffer
CWE: CWE-788 / CWE-120 / 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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Nessus ID: 307593
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2023-20585

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

10/27/2022 CVE reserved
04/16/2026 +1267 days Advisory disclosed
04/16/2026 +0 days VulDB entry created
04/21/2026 +4 days VulDB entry last update

Sourcesinfo

Advisory: amd.com
Status: Confirmed

CVE: CVE-2023-20585 (🔒)
GCVE (CVE): GCVE-0-2023-20585
GCVE (VulDB): GCVE-100-357955
EUVD: 🔒

Entryinfo

Created: 04/16/2026 21:40
Updated: 04/21/2026 00:32
Changes: 04/16/2026 21:40 (62), 04/16/2026 22:20 (1), 04/21/2026 00:32 (2)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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