Antiword through 0.37 Heap Out-of-Bounds Read via vGet8LstInfo in prop8.c

{
  "id": "d2e25b99667d52032479268c99a0c9a3c2f1fc540b5dc707809d31e68018552c",
  "url": "https://osv.dev/vulnerability/CVE-2026-111677",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Antiword through 0.37 Heap Out-of-Bounds Read via vGet8LstInfo in prop8.c",
    "summary": "Antiword through 0.37 contains a heap out-of-bounds read vulnerability in vGet8LstInfo in prop8.c caused by an inverted bounds check on the PlcfLst record count. Attackers can supply a crafted Word 8 .doc file claiming up to 0xffff LSTF records in a tiny buffer, causing reads past the heap allocation that crash the process.",
    "evidence": "osv:CVE-2026-111677",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-111677",
      "aliases": [
        "CVE-2026-111677"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/rsdoiel/antiword",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "fe4b579067122a2d9d62647efb1ee7cfe3ca92bb"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "0.37"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "cpe": "cpe:2.3:a:antiword_project:antiword:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "0.37"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "0.37"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-111677.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:24.791685104Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/111xxx/CVE-2026-111677.json",
        "https://hackmd.io/@haindpwn/antiword-word8-plcflst-count-and-fkp-run-oob-read",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-111677",
        "https://www.vulncheck.com/advisories/antiword-through-0.37-heap-out-of-bounds-read-via-vget8lstinfo-in-prop8-c",
        "https://github.com/rsdoiel/antiword",
        "https://github.com/rsdoiel/antiword/blob/fe4b579067122a2d9d62647efb1ee7cfe3ca92bb/prop8.c#L799-L825"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-125"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/111xxx/CVE-2026-111677.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-111677",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 491575,
  "published_at": "2026-10-16T17:39:36.663+00:00"
}