Use-of-uninitialized-value in udiv

{
  "id": "85ef121acb1fa6e41ccf85bedcbf4573a1bcc374562862d16762c32773e5a62d",
  "url": "https://osv.dev/vulnerability/OSV-2022-652",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Use-of-uninitialized-value in udiv",
    "summary": "OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=49542 ``` Crash type: Use-of-uninitialized-value Crash state: udiv mrb_bint_mod int_mod ```",
    "evidence": "osv:OSV-2022-652",
    "products": [
      {
        "name": {
          "value": "mruby",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "3.2.0-rc",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "3.2.0-rc2",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "3.2.0-rc3",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "3.2.0-rc4",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "3.2.0",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "3.3.0-rc",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "3.3.0-rc2",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "3.3.0",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "3.4.0-rc",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "3.4.0",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "3.4.0-rc2",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "4.0.0-rc",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "4.0.0-rc2",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "4.0.0-rc3",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "4.0.0-rc4",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "4.0.0",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "4.1.0-rc",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "4.1.0-rc2",
            "evidence": "/affected/0/versions"
          }
        ]
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "OSV-2022-652",
      "aliases": [
        "OSV-2022-652"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/mruby/mruby",
              "type": "GIT",
              "events": [
                {
                  "introduced": "547d465340b5358502483a97729a95661bcd754d"
                }
              ]
            }
          ],
          "package": {
            "name": "mruby",
            "purl": "pkg:generic/mruby",
            "ecosystem": "OSS-Fuzz"
          },
          "versions": [
            "3.2.0-rc",
            "3.2.0-rc2",
            "3.2.0-rc3",
            "3.2.0-rc4",
            "3.2.0",
            "3.3.0-rc",
            "3.3.0-rc2",
            "3.3.0",
            "3.4.0-rc",
            "3.4.0",
            "3.4.0-rc2",
            "4.0.0-rc",
            "4.0.0-rc2",
            "4.0.0-rc3",
            "4.0.0-rc4",
            "4.0.0",
            "4.1.0-rc",
            "4.1.0-rc2"
          ],
          "database_specific": {
            "source": "https://github.com/google/oss-fuzz-vulns/blob/main/vulns/mruby/OSV-2022-652.yaml"
          },
          "ecosystem_specific": {
            "severity": "MEDIUM"
          }
        }
      ],
      "modified": "2026-10-19T14:36:40.147275Z",
      "provider": "osv",
      "references": [
        "https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=49542"
      ]
    },
    "related_cves": [],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 375198,
  "published_at": "2022-07-29T00:02:04.321859+00:00"
}