An issue was discovered in OpenSC through 0.19.0 and 0.20.x through 0.20.0-rc3.
Priority LOW 21CWE-119Published · Updated
Key facts
- Attack vector
- Physical
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 1 fixed, 1 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-119 and the CVSS impact.
Summary
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.
Why it matters now
EPSS 0.00246 15th percentileScored 2026-11-07
Fix Partial Red Hat: 1 advisoryRed Hat: 1 fixed, 1 without a fix
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:opensc_project:opensc:0.19.0:-:*:*:*:*:*:* | 0.19.0 | Vulnerable | OpenSC |
| cpe:2.3:a:opensc_project:opensc:0.20.0:rc1:*:*:*:*:*:* | 0.20.0 rc1 | Vulnerable | OpenSC |
| cpe:2.3:a:opensc_project:opensc:0.20.0:rc2:*:*:*:*:*:* | 0.20.0 rc2 | Vulnerable | OpenSC |
| cpe:2.3:a:opensc_project:opensc:0.20.0:rc3:*:*:*:*:*:* | 0.20.0 rc3 | Vulnerable | OpenSC |
- cpe:2.3:a:opensc_project:opensc:0.19.0:-:*:*:*:*:*:* Versions 0.19.0 Vulnerable ·OpenSC
- cpe:2.3:a:opensc_project:opensc:0.20.0:rc1:*:*:*:*:*:* Versions 0.20.0 rc1 Vulnerable ·OpenSC
- cpe:2.3:a:opensc_project:opensc:0.20.0:rc2:*:*:*:*:*:* Versions 0.20.0 rc2 Vulnerable ·OpenSC
- cpe:2.3:a:opensc_project:opensc:0.20.0:rc3:*:*:*:*:*:* Versions 0.20.0 rc3 Vulnerable ·OpenSC
Remediation
Red Hat 1 advisory
- RHSA-2020:4483 Released 2020-11-04 · Red Hat rating Moderateopensc security, bug fix, and enhancement update
- Red Hat Enterprise Linux BaseOS (v. 8) opensc-0.20.0-2.el8
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Will not fix |
| Red Hat Enterprise Linux BaseOS (v. 8) | Fixed | RHSA-2020:4483 |
Timeline
- 2026-10-02 Threatist record created from CVE-2019-19481
- 2026-10-03 Alias added: GHSA-99x7-636q-6hvj
References
More Opensc vulnerabilities
- TI-2025-40564 OpenSC: `sc_compacttlv_find_tag` can return out-of-bounds pointers CVSS 3.1MEDIUM 6.8
- TI-2025-40563 OpenSC: Out of Bounds vulnerability CVSS 3.1MEDIUM 6.8
- TI-2019-04558 sc_context_create in ctx.c in libopensc in OpenSC 0.19.0 has a memory leak, as demonstrated by a call from eidenv. CVSS 3.0HIGH 7.5
- TI-2021-13306 Stack overflow vulnerability in OpenSC smart card middleware before 0.23 via crafted responses to APDUs. CVSS 3.1HIGH 7.5
- TI-2019-12067 An issue was discovered in the pam_p11 component 0.2.0 and 0.3.0 for OpenSC. CVSS 3.0HIGH 7.5
- TI-2023-21453 Opensc: potential pin bypass when card tracks its own login state CVSS 3.1MEDIUM 6.6
Sources
- CVE-2019-19481 · CVE Program
- CVE-2019-19481 · NVD
- FIRST EPSS
- GHSA-99x7-636q-6hvj · GitHub Advisory Database · CC BY 4.0
- CVE-2019-19481 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences