CVE-2026-81878

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.

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Produits concernés

• radareorg radare2
• Radare radare2

Scores CVSS

Faiblesses (CWE)

• CWE-190
• CWE-787

Références

• https://github.com/radareorg/radare2/commit/6727454b666b28c33837b219a5f91136461357c0 Patch
• https://github.com/radareorg/radare2/issues/26222 ExploitMitigationVendor 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 PatchVendor Advisory
• https://github.com/radareorg/radare2/issues/26222 ExploitMitigationVendor Advisory

Ailleurs

• NVD
• CVE.org
• CIRCL Vulnerability-Lookup
• CERT-FR
• GitHub Advisories