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CVE-2023-23583

Public on 2023-11-14
Modified on 2024-02-10
Description

An issue was found in redundant REX instruction prefix values affecting third generation Intel Xeon Scalable ("Icelake") processors. The issue may allow a local third-party actor using such instructions to cause a denial of service (DOS) or achieve privilege escalation. CVE-2023-23583 only affects Amazon Linux customers on EC2 metal platforms. Please refer to the AWS Security Bulletin for more information on the affected instance families and the impacts on AWS services: (https://aws.amazon.com/security/security-bulletins/AWS-2023-013)

Severity
Important
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CVSS v3 Base Score
8.8
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Affected Packages

Platform Package Release Date Advisory
Amazon Linux 1 microcode_ctl 2023-11-10 20:56 ALAS-2023-1890
Amazon Linux 2 - Core microcode_ctl 2023-11-09 19:19 ALAS2-2023-2341
Amazon Linux 2023 microcode_ctl 2023-11-09 21:29 ALAS2023-2023-436

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 8.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
NVD CVSSv3 8.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H