5.5

CVE-2026-81878

Exploit

radare2: Integer overflow causes heap out-of-bounds write in radare2 PYC parser

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Radare ≫ Radare2 Version < 6.2.0
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.18% 0.081
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
security-advisories@github.com 5.5 1.8 3.6
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CWE-190 Integer Overflow or Wraparound

The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.

CWE-787 Out-of-bounds Write

The product writes data past the end, or before the beginning, of the intended buffer.

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