Description
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.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | opensc | 0.19.0~rc1-1 | — |
| Debian 13 | opensc | 0.19.0~rc1-1 | — |
| Debian 12 | opensc | 0.19.0~rc1-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 18.04 LTS | opensc | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | opensc | 0.20.0-2.el8 | RHSA-2020:4483 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 | opensc | 0.18.0-150000.3.23.1 | SUSE-SU-2022:1041-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 | opensc | 0.18.0-150000.3.23.1 | SUSE-SU-2022:1041-1 |
| SLE HPC 15 | opensc | 0.18.0-150000.3.23.1 | SUSE-SU-2022:1041-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | opensc | 0.20.0-r0 | — |
| Alpine v3.23 | opensc | 0.20.0-r0 | — |
| Alpine v3.22 | opensc | 0.20.0-r0 | — |
| Alpine v3.21 | opensc | 0.20.0-r0 | — |
| Alpine v3.20 | opensc | 0.20.0-r0 | — |
Show 9 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | opensc | 0.20.0-r0 | — |
| Alpine v3.18 | opensc | 0.20.0-r0 | — |
| Alpine v3.17 | opensc | 0.20.0-r0 | — |
| Alpine v3.16 | opensc | 0.20.0-r0 | — |
| Alpine v3.15 | opensc | 0.20.0-r0 | — |
| Alpine v3.14 | opensc | 0.20.0-r0 | — |
| Alpine v3.13 | opensc | 0.20.0-r0 | — |
| Alpine v3.12 | opensc | 0.20.0-r0 | — |
| Alpine v3.11 | opensc | 0.20.0-r0 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | opensc | 0.20.0-2.el8 | ELSA-2020-4483 |
Advisories 4
- SUSE-SU-2022:1041-1 Security update for opensc SUSE / openSUSE Security Updates · Feb 4, 2026
- RHSA-2020:4483 Red Hat Security Advisory: opensc security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- WID-SEC-2023-2407 OpenSC: Mehrere Schwachstellen ermöglichen nicht spezifizierten Angriff BSI CERT-Bund (WID) · Sep 20, 2023
- ELSA-2020-4483 Moderate: opensc security, bug fix, and enhancement update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Nov 10, 2020