Eclipse OMR : arraycmp SIMD implementation does not check if the number of bytes to compare is zero

{
  "id": "0cfea24d4f7d6bcac152cb0e9343ca66699e8ffebe7c70879dfc0b1fb8917429",
  "url": "https://osv.dev/vulnerability/CVE-2026-16243",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Eclipse OMR : arraycmp SIMD implementation does not check if the number of bytes to compare is zero",
    "summary": "In Eclipse OMR versions up to 0.11, the arraycmp SIMD implementation for Z and P does not check if the number of bytes to compare is zero.",
    "evidence": "osv:CVE-2026-16243",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-16243",
      "aliases": [
        "CVE-2026-16243"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/eclipse-omr/omr",
              "type": "GIT",
              "events": [
                {
                  "introduced": "20db4fbc1ea570fd806783a97b16831f4f719eed"
                },
                {
                  "fixed": "8e2a2b1448c22475f5f7c6ca955c0defab327f48"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0.1"
                      },
                      {
                        "fixed": "0.11"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "cpe": "cpe:2.3:a:eclipse:omr:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0.1.0"
                      },
                      {
                        "last_affected": "0.10.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "omr-0.10.0",
            "omr-0.9.0",
            "omr-0.8.0",
            "omr-0.7.0",
            "omr-0.6.0",
            "omr-0.5.0",
            "omr-0.4.0",
            "omr-0.3.0",
            "omr-0.2.0",
            "omr-0.1.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-16243.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:28.250653160Z",
      "provider": "osv",
      "references": [
        "https://gitlab.eclipse.org/security/cve-assignment/-/work_items/195",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/16xxx/CVE-2026-16243.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-16243",
        "https://github.com/eclipse-omr/omr/pull/8348",
        "https://github.com/eclipse-omr/omr/pull/8349"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-125"
        ],
        "cna_assigner": "eclipse",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/16xxx/CVE-2026-16243.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-16243",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 494988,
  "published_at": "2026-07-21T17:46:25.674+00:00"
}