{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-81878", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-08-27T17:48:42.122Z", "datePublished": "2026-09-22T15:07:45.225Z", "dateUpdated": "2026-09-22T15:07:45.225Z"}, "containers": {"cna": {"title": "radare2: Integer overflow causes heap out-of-bounds write in radare2 PYC parser", "problemTypes": [{"descriptions": [{"cweId": "CWE-190", "lang": "en", "description": "CWE-190: Integer Overflow or Wraparound", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-787", "lang": "en", "description": "CWE-787: Out-of-bounds Write", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "version": "3.1"}}], "references": [{"name": "https://github.com/radareorg/radare2/security/advisories/GHSA-9phv-v2w8-56j3", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/radareorg/radare2/security/advisories/GHSA-9phv-v2w8-56j3"}, {"name": "https://github.com/radareorg/radare2/issues/26222", "tags": ["x_refsource_MISC"], "url": "https://github.com/radareorg/radare2/issues/26222"}, {"name": "https://github.com/radareorg/radare2/pull/26177", "tags": ["x_refsource_MISC"], "url": "https://github.com/radareorg/radare2/pull/26177"}, {"name": "https://github.com/radareorg/radare2/commit/6727454b666b28c33837b219a5f91136461357c0", "tags": ["x_refsource_MISC"], "url": "https://github.com/radareorg/radare2/commit/6727454b666b28c33837b219a5f91136461357c0"}, {"name": "https://github.com/radareorg/radare2/releases/tag/6.2.0", "tags": ["x_refsource_MISC"], "url": "https://github.com/radareorg/radare2/releases/tag/6.2.0"}], "affected": [{"vendor": "radareorg", "product": "radare2", "versions": [{"version": "< 6.2.0", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-09-22T15:07:45.225Z"}, "descriptions": [{"lang": "en", "value": "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."}], "source": {"advisory": "GHSA-9phv-v2w8-56j3", "discovery": "UNKNOWN"}}}}

{}

{"affected": [{"affectedData": [{"product": "radare2", "vendor": "radareorg", "versions": [{"status": "affected", "version": "< 6.2.0"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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", "lastModified": "2026-09-22T16:18:02.457", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-09-22T16:18:02.457", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/radareorg/radare2/commit/6727454b666b28c33837b219a5f91136461357c0"}, {"source": "security-advisories@github.com", "url": "https://github.com/radareorg/radare2/issues/26222"}, {"source": "security-advisories@github.com", "url": "https://github.com/radareorg/radare2/pull/26177"}, {"source": "security-advisories@github.com", "url": "https://github.com/radareorg/radare2/releases/tag/6.2.0"}, {"source": "security-advisories@github.com", "url": "https://github.com/radareorg/radare2/security/advisories/GHSA-9phv-v2w8-56j3"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-190"}, {"lang": "en", "value": "CWE-787"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

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