opensc: OpenSC is an open source smart card tools and middleware
CVE-2025-66037 is fixed in opensc on 1 platform, first by DEBIAN-CVE-2025-66037, released March 30, 2026. It is not reported as exploited. Patch Radar priority: Routine.
OpenSC is an open source smart card tools and middleware. Prior to version 0.27.0, feeding a crafted input to the fuzz_pkcs15_reader harness causes OpenSC to perform an out-of-bounds heap read in the X.509/SPKI handling path. Specifically, sc_pkcs15_pubkey_from_spki_fields() allocates a zero-length buffer and then reads one byte past the end of that allocation. This issue has been patched in version 0.27.0.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| opensc · Debian 14 | 0.27.1-1 | DEBIAN-CVE-2025-66037 | Mar 30, 2026 |
| opensc · opensuse-leap 16.0 | 0.26.1-160000.3.1 | OPENSUSE-SU-2026:20967-1 | Jun 15, 2026 |
| opensc · sles 15.6 | 0.22.0-150600.11.11.1 | SUSE-SU-2026:2697-1 | Jun 30, 2026 |
| opensc · sles 15.7 | 0.22.0-150600.11.11.1 | SUSE-SU-2026:2697-1 | Jun 30, 2026 |
| opensc · sles 16.0 | 0.26.1-160000.3.1 | SUSE-SU-2026:22126-1 | Jun 15, 2026 |
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