{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "6.2.0"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6727454b666b28c33837b219a5f91136461357c0"
            },
            {
              "fixed": "e1fc278734ad62f933fc6f91edb29e4ba732f402"
            }
          ],
          "repo": "https://github.com/radareorg/radare2",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-9phv-v2w8-56j3"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-190",
      "CWE-787"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/81xxx/CVE-2026-81878.json"
  },
  "details": "radare2 is a UNIX-like reverse engineering framework and command-line toolset. Prior to 6.2.0, radare2's CPython bytecode .pyc marshal parser was vulnerable because the CPython marshal readers accepted a 32-bit string length without rejecting values that overflow the size-plus-one allocation. The vulnerability is triggered by opening or inspecting a crafted .pyc file through r2 or rabin2. A length of 0xffffffff wrapped the allocation to zero before the common byte reader wrote attacker-controlled data and fill bytes beyond the heap allocation. This can cause heap memory corruption and denial of service; arbitrary code execution is possible but has not been demonstrated. This issue is fixed in version 6.2.0.",
  "id": "CVE-2026-81878",
  "modified": "2026-09-25T03:30:42.158705290Z",
  "published": "2026-09-22T15:07:45.225Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/radareorg/radare2/releases/tag/6.2.0"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/81xxx/CVE-2026-81878.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/radareorg/radare2/security/advisories/GHSA-9phv-v2w8-56j3"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-81878"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/radareorg/radare2/issues/26222"
    },
    {
      "type": "FIX",
      "url": "https://github.com/radareorg/radare2/commit/6727454b666b28c33837b219a5f91136461357c0"
    },
    {
      "type": "FIX",
      "url": "https://github.com/radareorg/radare2/pull/26177"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "radare2: Integer overflow causes heap out-of-bounds write in radare2 PYC parser"
}