Security advisory

{
  "id": "d2063fa77f2bb724bf31cd054b0553bd0c4ae2db39b3ad3138ec1c24c8faadb1",
  "url": "https://osv.dev/vulnerability/CVE-2025-12771",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2025-12771",
    "summary": "IBM Concert 1.0.0 through 2.1.0 is vulnerable to a stack-based buffer overflow, caused by improper bounds checking. A local user could overflow the buffer and execute arbitrary code on the system.",
    "evidence": "osv:CVE-2025-12771",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2025-12771",
      "aliases": [
        "CVE-2025-12771"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/ibm/concert",
              "type": "GIT",
              "events": [
                {
                  "introduced": "426f6aa6046da617b10805b6640f52450316ba2e"
                },
                {
                  "fixed": "56e717102884f7f004d671d5f7273b6a5d434e49"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:ibm:concert:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "1.0.0"
                      },
                      {
                        "fixed": "2.2.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v2.1.0",
            "v2.0.0.2",
            "v1.1.0",
            "v2.0.0.1",
            "v2.0.0.0",
            "v1.0.5.4",
            "v1.0.5.2",
            "v1.0.5.1",
            "v1.0.4.1",
            "v1.0.4",
            "v1.0.3",
            "v1.0.2.2",
            "v1.0.2.1",
            "v1.0.2",
            "v1.0.1",
            "1.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-12771.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:34.747241790Z",
      "provider": "osv",
      "references": [
        "https://www.ibm.com/support/pages/node/7255549"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2025-12771",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 433608,
  "published_at": "2025-12-26T13:15:45.407+00:00"
}