{
  "cveId": "CVE-2025-66038",
  "url": "https://patchblox.com/security/cve/CVE-2025-66038",
  "summary": "CVE-2025-66038 is fixed in opensc on 1 platform, first by DEBIAN-CVE-2025-66038, released March 30, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "opensc: OpenSC is an open source smart card tools and middleware",
  "description": "OpenSC is an open source smart card tools and middleware. Prior to version 0.27.0, sc_compacttlv_find_tag searches a compact-TLV buffer for a given tag. In compact-TLV, a single byte encodes the tag (high nibble) and value length (low nibble). With a 1-byte buffer {0x0A}, the encoded element claims tag=0 and length=10 but no value bytes follow. Calling sc_compacttlv_find_tag with search tag 0x00 returns a pointer equal to buf\u002B1 and outlen=10 without verifying that the claimed value length fits within the remaining buffer. In cases where the sc_compacttlv_find_tag is provided untrusted data (such as being read from cards/files), attackers may be able to influence it to return out-of-bounds pointers leading to downstream memory corruption when subsequent code tries to dereference the pointer. This issue has been patched in version 0.27.0.",
  "published": "2026-03-30T18:16:18Z",
  "severity": "medium",
  "cvss": 6.8,
  "cvssVector": "CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.00293,
  "epssPercentile": 0.22039,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "opensc",
      "release": "Debian 14",
      "fixedVersion": "0.27.0~rc1-1",
      "fix": "DEBIAN-CVE-2025-66038",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2025-66038",
      "released": "2026-03-30T18:16:18Z"
    },
    {
      "platform": "linux",
      "product": "opensc",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "0.26.1-160000.3.1",
      "fix": "OPENSUSE-SU-2026:20967-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-20967-1",
      "released": "2026-06-15T11:47:03Z"
    },
    {
      "platform": "linux",
      "product": "opensc",
      "release": "sles 15.6",
      "fixedVersion": "0.22.0-150600.11.11.1",
      "fix": "SUSE-SU-2026:2697-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-2697-1",
      "released": "2026-06-30T09:15:07Z"
    },
    {
      "platform": "linux",
      "product": "opensc",
      "release": "sles 15.7",
      "fixedVersion": "0.22.0-150600.11.11.1",
      "fix": "SUSE-SU-2026:2697-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-2697-1",
      "released": "2026-06-30T09:15:07Z"
    },
    {
      "platform": "linux",
      "product": "opensc",
      "release": "sles 16.0",
      "fixedVersion": "0.26.1-160000.3.1",
      "fix": "SUSE-SU-2026:22126-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-22126-1",
      "released": "2026-06-15T11:42:48Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T06:59:42Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}