How severe is CVE-2018-16422?

CVE-2018-16422 has a CVSS 3.x base score of 6.6, rated medium severity. It is exploitable over physical access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-16422 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-16422?

CVE-2018-16422 affects Opensc Project Opensc. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-16422?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2018-16422 published?

CVE-2018-16422 was published on 2018-09-04 and last updated on 2026-06-17.

CVE-2018-16422

CVE-2018-16422 is a medium-severity vulnerability in Opensc Project Opensc with a CVSS 3.x base score of 6.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-119.

Key facts

Severity: Medium (CVSS 3.x base score 6.6)
CVSS v2: 4.6
EPSS exploit prediction: 1% (48th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Opensc Project Opensc
Published: 2018-09-04
Last modified: 2026-06-17

Description

A single byte buffer overflow when handling responses from an esteid Card in sc_pkcs15emu_esteid_init in libopensc/pkcs15-esteid.c in OpenSC before 0.19.0-rc1 could be used by attackers able to supply crafted smartcards to cause a denial of service (application crash) or possibly have unspecified other impact.

Frequently asked questions

What is CVE-2018-16422?: A single byte buffer overflow when handling responses from an esteid Card in sc_pkcs15emu_esteid_init in libopensc/pkcs15-esteid.c in OpenSC before 0.19.0-rc1 could be used by attackers able to supply crafted smartcards to cause a denial of service (application crash) or possibly have unspecified other impact.
How severe is CVE-2018-16422?: CVE-2018-16422 has a CVSS 3.x base score of 6.6, rated medium severity. It is exploitable over physical access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-16422 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-16422?: CVE-2018-16422 affects Opensc Project Opensc. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-16422?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-16422 published?: CVE-2018-16422 was published on 2018-09-04 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:opensc_project:opensc:*:*:*:*:*:*:*:*

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