PT-2023-6562 · Intel+6 · Intel Processors+6

Alexandra Sandulescu + 15 · Published 2023-10-24 · Updated 2025-11-11 · CVE-2023-23583

Positive Technologies (AI Summary)

CVSS v3.1

8.8

High

Base vector

AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Intel Processors (affected versions not specified)

Description A sequence of processor instructions can lead to unexpected behavior in some Intel processors, potentially allowing an authenticated user to enable escalation of privilege, information disclosure, or denial of service via local access. This issue is related to the interpretation of redundant prefixes and can cause the system to crash or become unresponsive. The vulnerability, termed Reptar, primarily affects multi-tenant virtualized environments where multiple virtual machines are run on the same host.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

DoS

Incorrect Default Permissions

Weakness Enumeration

CWE-1281

CWE-264

CWE-276

Related Identifiers

ALT-PU-2023-7248

ALT-PU-2023-7281

ALT-PU-2023-7691

ALT-PU-2023-8026

ALT-PU-2023-8027

BDU:2023-07325

CVE-2023-23583

DLA-3690-1

DSA-5563-1

MGASA-2024-0028

OESA-2023-1855

OPENSUSE-SU-2023_4440-1

OPENSUSE-SU-2023_4500-1

OPENSUSE-SU-2024:13434-1

ROSA-SA-2025-2872

SUSE-SU-2023:4440-1

SUSE-SU-2023:4441-1

SUSE-SU-2023:4442-1

SUSE-SU-2023:4493-1

SUSE-SU-2023:4500-1

SUSE-SU-2023:4510-1

SUSE-SU-2023_4440-1

SUSE-SU-2023_4441-1

SUSE-SU-2023_4442-1

SUSE-SU-2023_4493-1

SUSE-SU-2023_4500-1

SUSE-SU-2023_4510-1

SUSE-SU-2025:1032-1

USN-6485-1

Affected Products

Alt Linux

Astra Linux

Intel Processors

Linuxmint

Red Os

Suse

Ubuntu

References · 120

• 🔥 https://github.com/google/security-research/tree/master/pocs/cpus/reptar · Exploit
• https://bdu.fstec.ru/vul/2023-07325 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2023:4441-1 · Vendor Advisory
• https://osv.dev/vulnerability/MGASA-2024-0028 · Vendor Advisory
• https://intel.com/content/www/us/en/security-center/advisory/intel-sa-00950.html · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-23583 · Security Note
• https://linux.oracle.com/errata/ELSA-2023-12991.html · Vendor Advisory
• http://repo.red-soft.ru/redos/7.3c/x86_64/updates · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2023-23583 · Security Note
• https://safe-surf.ru/specialists/bulletins-nkcki/708868 · Security Note
• https://ubuntu.com/security/notices/USN-6485-1 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2023-1855 · Vendor Advisory
• https://ubuntu.com/security/CVE-2023-23583 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2023:4442-1 · Vendor Advisory
• https://osv.dev/vulnerability/BELL-CVE-2023-23583 · Vendor Advisory