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CVE-2023-23583

27
FAUCET Score

CVE-2023-23583, also known as "Reptar," is a high-severity vulnerability affecting certain Intel processors, including those found in Debian and NetApp products. This flaw, stemming from unexpected processor instruction behavior, allows an authenticated local user to potentially achieve privilege escalation, information disclosure, or denial of service. With a CVSS score of 7.8, it requires local access and has low attack complexity, posing a significant risk to confidentiality, integrity, and availability. While there is no known active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered substantial community discussion and media coverage, indicating high awareness despite its inactive status on the CISA KEV and Hot Lists.

Impacted Technologies

VendorProductVersion(s)CPE
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:o:intel:core_i3-10100y_firmware:-:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:o:intel:core_i3-10110u_firmware:-:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:o:intel:core_i3-10110y_firmware:-:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:o:intel:core_i3-1005g1_firmware:-:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:o:intel:core_i5-10500h_firmware:-:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.8HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.0
Impact Score
6.0
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.73%
Probability of exploitation in next 30 days
EPSS Percentile
75.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0173 is in the 96th percentile among its peer group of 17,061 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Advisories (1)

redhatCVE-2023-23583Important

hw: Intel: execution of MOVSB instructions with redundant REX prefix leads to unintended system behavior

Nov 14, 2023

References

lists.debian.org / debian-lts-announce/2023/12/msg00012.html
security.netapp.com / advisory/ntap-20231116-0015
Third Party Advisory
debian.org / security/2023/dsa-5563
Third Party Advisory
intel.com / content/www/us/en/security-center/advisory/intel-sa-00950.html
Vendor Advisory
openwall.com / lists/oss-security/2023/11/14/4
Mailing ListThird Party Advisory
openwall.com / lists/oss-security/2023/11/14/5
Mailing ListThird Party Advisory
openwall.com / lists/oss-security/2023/11/14/6
Mailing ListThird Party Advisory
openwall.com / lists/oss-security/2023/11/14/7
Mailing ListThird Party Advisory
openwall.com / lists/oss-security/2023/11/14/8
Mailing List
openwall.com / lists/oss-security/2023/11/14/9
Mailing List