PT-2026-29081 · Opensc · Opensc

Published 2025-01-01 · Updated 2026-04-30 · CVE-2025-66037

Positive Technologies (AI Summary)

CVSS v3.1

6.8

Medium

Base vector

AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions OpenSC versions prior to 0.27.0

Description OpenSC is an open source smart card tools and middleware. Prior to version 0.27.0, providing a crafted input to the fuzz pkcs15 reader harness results in an out-of-bounds heap read within the X.509/SPKI handling path. Specifically, the sc pkcs15 pubkey from spki fields() function allocates a zero-length buffer and subsequently attempts to read one byte beyond the allocated memory.

Recommendations Update to version 0.27.0 or later.

Exploit

Fix

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

CVE-2025-66037

GHSA-M58Q-RMJM-MMFX

OPENSUSE-SU-2026:10475-1

SUSE-SU-2026:1477-1

SUSE-SU-2026:21283-1

SUSE-SU-2026:21320-1

Affected Products

Opensc

References · 27

• 🔥 https://github.com/OpenSC/OpenSC/wiki/CVE-2025-66037 · Exploit
• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/66xxx/CVE-2025-66037.json · Exploit
• https://github.com/OpenSC/OpenSC/security/advisories/GHSA-m58q-rmjm-mmfx · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2026:10475-1 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2025-66037 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2025-66037 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2025-66037 · Vendor Advisory
• https://osv.dev/vulnerability/BELL-CVE-2025-66037 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2025-66037 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-66037 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-66037 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2026:1477-1 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2025-66037 · Security Note
• https://suse.com/security/cve/CVE-2025-66037 · Note
• https://bugzilla.suse.com/1261220 · Note