CVE-2026-81878

{"id": "CVE-2026-81878", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-81878", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-09-22T17:54:59.836434Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 1.8}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "radareorg", "product": "radare2", "versions": [{"status": "affected", "version": "< 6.2.0"}]}]}], "published": "2026-09-22T16:18:02.457", "references": [{"url": "https://github.com/radareorg/radare2/commit/6727454b666b28c33837b219a5f91136461357c0", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/radareorg/radare2/issues/26222", "tags": ["Exploit", "Mitigation", "Vendor Advisory"], "source": "security-advisories@github.com"}, {"url": "https://github.com/radareorg/radare2/pull/26177", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/radareorg/radare2/releases/tag/6.2.0", "tags": ["Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/radareorg/radare2/security/advisories/GHSA-9phv-v2w8-56j3", "tags": ["Patch", "Vendor Advisory"], "source": "security-advisories@github.com"}, {"url": "https://github.com/radareorg/radare2/issues/26222", "tags": ["Exploit", "Mitigation", "Vendor Advisory"], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-190"}, {"lang": "en", "value": "CWE-787"}]}], "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."}], "lastModified": "2026-09-25T16:54:31.207", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:radare:radare2:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "89E67591-1BCF-49F0-B047-71FCB5524CDB", "versionEndExcluding": "6.2.0"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}