Integer overflow in Silicon Labs Gecko Bootloader leads to unbounded memory access

{
  "id": "742d2dbd2f6f1b3d9177a6df68e8a31ce23e391802f4ae825a938bc0e9a50253",
  "url": "https://osv.dev/vulnerability/CVE-2023-3487",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Integer overflow in Silicon Labs Gecko Bootloader leads to unbounded memory access",
    "summary": "An integer overflow in Silicon Labs Gecko Bootloader version 4.3.1 and earlier allows unbounded memory access when reading from or writing to storage slots.",
    "evidence": "osv:CVE-2023-3487",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2023-3487",
      "aliases": [
        "CVE-2023-3487"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/siliconlabs/gecko_sdk",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "2ba59bf969e94a0544e73e501d876722790f7a89"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "1.0"
                      },
                      {
                        "last_affected": "4.3.1"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "cpe": "cpe:2.3:a:silabs:gecko_bootloader:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "4.3.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v4.3.1",
            "v4.2.3",
            "v4.3.0",
            "v4.2.2",
            "v4.2.1",
            "v4.2.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-3487.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:49.073725540Z",
      "provider": "osv",
      "references": [
        "https://community.silabs.com/s/contentdocument/0698Y00000ZmXqLQAV",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/3xxx/CVE-2023-3487.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2023-3487",
        "https://github.com/SiliconLabs/gecko_sdk/releases"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-125",
          "CWE-787"
        ],
        "cna_assigner": "Silabs",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/3xxx/CVE-2023-3487.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2023-3487",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 517388,
  "published_at": "2023-10-20T14:12:44.805+00:00"
}