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CVE-2018-16423

22
FAUCET Score

CVE-2018-16423 is a double free vulnerability in OpenSC versions prior to 0.19.0-rc1, specifically within the sc_file_set_sec_attr function when processing smartcard responses. An attacker with the ability to provide a specially crafted smartcard could exploit this to trigger a denial of service (application crash) or potentially achieve other unspecified impacts. The vulnerability has a CVSS score of 6.6 (Medium) and requires physical access to the system (AV:P) and low privileges (PR:L). There is no known active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 0.18.0CPE matchmatch criteria
cpe:2.3:a:opensc_project:opensc:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

6.6MEDIUM

CVSS:3.0/AV:P/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector
PHYSICAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
0.7
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.66%
Probability of exploitation in next 30 days
EPSS Percentile
47.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0066 is in the 77th percentile among its peer group of 170 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

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

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: opensc-0:0.19.0-3.el7
View patch

Vendor Advisories (1)

redhatCVE-2018-16423Moderate

opensc: Double free handling responses from smartcards in libopensc/sc.c:sc_file_set_sec_attr()

Sep 12, 2018

References

access.redhat.com / errata/RHSA-2019:2154
github.com / OpenSC/OpenSC/commit/360e95d45ac4123255a4c796db96337f332160ad
PatchThird Party Advisory
github.com / OpenSC/OpenSC/releases/tag/0.19.0-rc1
PatchRelease NotesThird Party Advisory
lists.debian.org / debian-lts-announce/2019/09/msg00009.html
x41-dsec.de / lab/advisories/x41-2018-002-OpenSC
ExploitThird Party Advisory