What is CVE-2019-19481?

CVE-2019-19481 is a medium-severity vulnerability in Opensc Project, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 4.6/10. Published 2019-12-01.

How severe is CVE-2019-19481?

Medium severity. CVSS v3 base score is 4.6 out of 10.

Buffer overflow in Opensc Project

CVE-2019-19481

An issue was discovered in OpenSC through 0.19.0 and 0.20.x through 0.20.0-rc3. libopensc/card-cac1.c mishandles buffer limits for CAC certificates.

Vulnerability class: Buffer Overflow

Published 2019-12-01 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.6 (Medium). Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.002 (14.4th percentile), scored 2026-10-06.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 14th percentile — 14.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

Opensc Project — versions 0.19.0, 0.20.0

Weakness classification (CWE)

CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer

References

github.com/OpenSC/OpenSC/commit/b75c002cfb1fd61cd20ec938ff4937d7b1a94278 (Patch)
bugs.chromium.org/p/oss-fuzz/issues/detail (Permissions Required, Third Party Advisory)
www.openwall.com/lists/oss-security/2019/12/29/1 (mailing-list, Mailing List)
lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)

Frequently asked questions

What is CVE-2019-19481?: CVE-2019-19481 is a medium-severity vulnerability in Opensc Project, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 4.6/10. Published 2019-12-01.
How severe is CVE-2019-19481?: Medium severity. CVSS v3 base score is 4.6 out of 10.