CVE-2026-81878

5.5 MEDIUMpublic exploit available

Published 2026-09-22 · Updated 2026-09-25

AI analysis for this CVE has not been generated yet. Raw NVD data is shown below.

NVD 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.

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Weaknesses

CWE-190, CWE-787

Vendors

radare

Products

radare2

Public exploit & PoC references

https://github.com/radareorg/radare2/commit/6727454b666b28c33837b219a5f91136461357c0[Patch]
https://github.com/radareorg/radare2/issues/26222[Exploit, Mitigation, Vendor Advisory]
https://github.com/radareorg/radare2/pull/26177[Patch]
https://github.com/radareorg/radare2/releases/tag/6.2.0[Release Notes]
https://github.com/radareorg/radare2/security/advisories/GHSA-9phv-v2w8-56j3[Patch, Vendor Advisory]
https://github.com/radareorg/radare2/issues/26222[Exploit, Mitigation, Vendor Advisory]

All references

Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.

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