CVE-2025-66037CWE-125

OpenSC: Out of Bounds vulnerability

Low · published March 30, 2026

CVSS v3.1
3.9
EPSS
0%
Percentile
15.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
3.9 · LOW
Vector
CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
CVSS v4.0
Not supplied
EPSS
0.00253 · 15.9th percentile
Weakness
CWE-125 · Out-of-bounds Read
Published
2026-03-30T17:01Z
EPSS history
Timeline
  • 30 MAR 17:01Z
    OpenSC: Out of Bounds vulnerability
    cvelistv5