Ghidra through 12.1.4 Stack-based Buffer Overflow via leftshift128

{
  "id": "de6990fff87957a13009d00ed839464c07690cb1d8a19b4dd1bbc733063633da",
  "url": "https://osv.dev/vulnerability/CVE-2026-100504",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Ghidra through 12.1.4 Stack-based Buffer Overflow via leftshift128",
    "summary": "Ghidra versions through 12.1.4 contain a stack-based out-of-bounds write vulnerability in the decompiler's leftshift128 function when processing negative shift amounts from p-code. Attackers can craft malicious binaries with specific instruction sequences that trigger the overflow when decompiled, corrupting memory and potentially achieving code execution.",
    "evidence": "osv:CVE-2026-100504",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-100504",
      "aliases": [
        "CVE-2026-100504"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/nationalsecurityagency/ghidra",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "6babe3c1cec7f5ec920dd16cdc86a02893e5b33c"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:nsa:ghidra:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "12.1.4"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "6babe3c1cec7f5ec920dd16cdc86a02893e5b33c"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "Ghidra_10.3_build",
            "Ghidra_9.0.1_build"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-100504.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:23.359063976Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/100xxx/CVE-2026-100504.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-100504",
        "https://www.vulncheck.com/advisories/ghidra-through-12.1.4-stack-based-buffer-overflow-via-leftshift128",
        "https://github.com/NationalSecurityAgency/ghidra/commit/6babe3c1cec7f5ec920dd16cdc86a02893e5b33c",
        "https://github.com/NationalSecurityAgency/ghidra",
        "https://github.com/NationalSecurityAgency/ghidra/blob/8b6bbb857accdfa20dc5b2f5dea471178c2e9fbc/Ghidra/Features/Decompiler/src/decompile/cpp/multiprecision.cc#L29-L61",
        "https://github.com/NationalSecurityAgency/ghidra/blob/8b6bbb857accdfa20dc5b2f5dea471178c2e9fbc/Ghidra/Features/Decompiler/src/decompile/cpp/ruleaction.cc#L7848-L7878"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-787"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/100xxx/CVE-2026-100504.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-100504",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 489787,
  "published_at": "2026-09-26T00:36:32.604+00:00"
}