{"id":"DEBIAN-CVE-2025-66037","details":"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.","modified":"2026-09-01T16:06:20.827487758Z","published":"2026-03-30T18:16:18.007Z","upstream":["CVE-2025-66037"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2025-66037"}],"affected":[{"package":{"name":"opensc","ecosystem":"Debian:12","purl":"pkg:deb/debian/opensc?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.23.0-0.3","0.23.0-0.3+deb12u1","0.23.0-0.3+deb12u2","0.23.0-1","0.23.0-2","0.24.0~rc1-1","0.25.0~rc1-1","0.25.1-1","0.25.1-2","0.25.1-2.1","0.26.0-1","0.26.1-1","0.26.1-2","0.26.1-3","0.27.0~rc1-1","0.27.0~rc2-1","0.27.1-1","0.27.1-2"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2025-66037.json"}},{"package":{"name":"opensc","ecosystem":"Debian:13","purl":"pkg:deb/debian/opensc?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.26.1-2","0.26.1-3","0.27.0~rc1-1","0.27.0~rc2-1","0.27.1-1","0.27.1-2"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2025-66037.json"}},{"package":{"name":"opensc","ecosystem":"Debian:14","purl":"pkg:deb/debian/opensc?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.27.1-1"}]}],"versions":["0.26.1-2","0.26.1-3","0.27.0~rc1-1","0.27.0~rc2-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2025-66037.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}