{"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":"2026-09-22T17:55:51.200Z"},"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"}},"adp":[{"references":[{"url":"https://github.com/radareorg/radare2/issues/26222","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-22T17:54:59.836434Z","id":"CVE-2026-81878","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-09-22T17:55:51.200Z"}}]}}