{"id":"CVE-2026-81878","published":"2026-09-22T16:18:02.457","lastModified":"2026-09-25T16:54:31.207","description":"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.","cvssScore":5.5,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","cwes":["CWE-190","CWE-787"],"vendors":["radare"],"products":["radare2"],"references":[{"url":"https://github.com/radareorg/radare2/commit/6727454b666b28c33837b219a5f91136461357c0","tags":["Patch"]},{"url":"https://github.com/radareorg/radare2/issues/26222","tags":["Exploit","Mitigation","Vendor Advisory"]},{"url":"https://github.com/radareorg/radare2/pull/26177","tags":["Patch"]},{"url":"https://github.com/radareorg/radare2/releases/tag/6.2.0","tags":["Release Notes"]},{"url":"https://github.com/radareorg/radare2/security/advisories/GHSA-9phv-v2w8-56j3","tags":["Patch","Vendor Advisory"]},{"url":"https://github.com/radareorg/radare2/issues/26222","tags":["Exploit","Mitigation","Vendor Advisory"]}],"exploitRefs":[{"url":"https://github.com/radareorg/radare2/commit/6727454b666b28c33837b219a5f91136461357c0","tags":["Patch"]},{"url":"https://github.com/radareorg/radare2/issues/26222","tags":["Exploit","Mitigation","Vendor Advisory"]},{"url":"https://github.com/radareorg/radare2/pull/26177","tags":["Patch"]},{"url":"https://github.com/radareorg/radare2/releases/tag/6.2.0","tags":["Release Notes"]},{"url":"https://github.com/radareorg/radare2/security/advisories/GHSA-9phv-v2w8-56j3","tags":["Patch","Vendor Advisory"]},{"url":"https://github.com/radareorg/radare2/issues/26222","tags":["Exploit","Mitigation","Vendor Advisory"]}],"hasPoc":true,"ai":null}