Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2023-4535

14
FAUCET Score

CVE-2023-4535 is an out-of-bounds read vulnerability in the MyEID driver within OpenSC packages, affecting various Fedora and Red Hat Enterprise Linux versions. This low-severity flaw requires physical access to the system and a specially crafted USB device or smart card to exploit, allowing an attacker to manipulate APDU responses and potentially gain limited access to sensitive data. While the vulnerability has a low CVSS score of 3.8, its potential impact includes compromise of confidentiality, integrity, and availability. There is no known active exploitation, public exploit code, or significant community discussion, and it is not listed in the KEV catalog.

Impacted Technologies

VendorProductVersion(s)CPE
0.23.0CPE matchmatch criteria
cpe:2.3:a:opensc_project:opensc:0.23.0:-:*:*:*:*:*:*
0.23.0CPE matchmatch criteria
cpe:2.3:a:opensc_project:opensc:0.23.0:rc1:*:*:*:*:*:*
0.23.0CPE matchmatch criteria
cpe:2.3:a:opensc_project:opensc:0.23.0:rc2:*:*:*:*:*:*
38CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:*
39CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:39:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

4.5MEDIUM

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

Attack Vector
PHYSICAL
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
LOW
Exploitability Score
0.4
Impact Score
3.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.47%
Probability of exploitation in next 30 days
EPSS Percentile
37.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0047 is in the 100th percentile among its peer group of 5 CVEs.

Social Chatter

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

Media Mentions

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

Remediation

Patch Available

Vendor Patches (12)

github_advisorypatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: 18254-16823Fixed in: 0.23.0-2
microsoftpatch availablevia msrc
Product: 17819-17084Fixed in: 0.25.1-3
microsoftpatch availablevia msrc
Product: 19857-17084Fixed in: 0.25.1-3
microsoftpatch availablevia msrc
Product: cbl2 opensc 0.23.0-2 on CBL Mariner 2.0Fixed in: 0.23.0-2
microsoftpatch availablevia msrc
Product: azl3 opensc 0.25.1-3 on Azure Linux 3.0Fixed in: 0.25.1-3
microsoftpatch availablevia msrc
Product: azl3 opensc 0.23.0-1 on Azure Linux 3.0Fixed in: 0.25.1-3
microsoftpatch availablevia msrc
Product: CBL Mariner 2.0 x64Fixed in: 0.23.0-2
microsoftpatch availablevia msrc
Product: CBL Mariner 2.0 ARMFixed in: 0.23.0-2
microsoftpatch availablevia msrc
Product: Azure Linux 3.0 x64Fixed in: 0.25.1-3
microsoftpatch availablevia msrc
Product: Azure Linux 3.0 ARMFixed in: 0.25.1-3
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: opensc-0:0.23.0-3.el9_3
View patch

Vendor Advisories (3)

microsoft2024-Jun/CVE-2023-4535

CVE-2023-4535

Jun 11, 2024
microsoft2023-Nov/CVE-2023-4535Low

Opensc: out-of-bounds read in myeid driver handling encryption using symmetric keys

Nov 14, 2023
redhatCVE-2023-4535Low

OpenSC: out-of-bounds read in MyEID driver handling encryption using symmetric keys

Sep 25, 2023

References

lists.fedoraproject.org / archives/list/[email protected]/message/3CPQOMCDWFRBMEFR5VK4N5MMXXU42ODE
lists.fedoraproject.org / archives/list/[email protected]/message/GLYEFIBBA37TK3UNMZN5NOJ7IWCIXLQP
access.redhat.com / errata/RHSA-2023:7879
Third Party Advisory
access.redhat.com / security/cve/CVE-2023-4535
Third Party Advisory
bugzilla.redhat.com / show_bug.cgi
Issue Tracking
github.com / OpenSC/OpenSC/commit/f1993dc4e0b33050b8f72a3558ee88b24c4063b2
Patch
github.com / OpenSC/OpenSC/issues/2792
Issue TrackingPatch
github.com / OpenSC/OpenSC/releases/tag/0.24.0-rc1
Release Notes
github.com / OpenSC/OpenSC/wiki/OpenSC-security-advisories
Vendor Advisory