---
id: CVE-2026-81880
title: radare2 is a UNIX-like reverse engineering framework and command-line toolset
summary: >-
  radare2 is a UNIX-like reverse engineering framework and command-line toolset.
  Prior to 6.2.0, radare2's Apple Preferred Executable Format loader was
  vulnerable because the PEF loader accepted relocSecCount values that were not
  bounded b…
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'
cwe:
  - CWE-400
  - CWE-834
vendor: radare
product: radare2
affected:
  - radare2 < 6.2.0
patched:
  - radare2 6.2.0
published: '2026-09-22'
updated: '2026-09-26'
sourceUpdated: '2026-09-26T00:16:36.517'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-81880'
references:
  - url: >-
      https://github.com/radareorg/radare2/commit/87c780e29ee6251cebaab51585d14482cb7740ac
    label: security-advisories@github.com
  - url: 'https://github.com/radareorg/radare2/releases/tag/6.2.0'
    label: security-advisories@github.com
  - url: >-
      https://github.com/radareorg/radare2/security/advisories/GHSA-fg6f-rj8g-25pq
    label: security-advisories@github.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-25T23:29:23.090514Z'
epss: 0.00127
epssPercentile: 0.01964
ingestedAt: '2026-09-22T16:06:00.500Z'
---

## Overview

radare2 is a UNIX-like reverse engineering framework and command-line toolset. Prior to 6.2.0, radare2's Apple Preferred Executable Format loader was vulnerable because the PEF loader accepted relocSecCount values that were not bounded by the number of sections or complete relocation records in the input. The vulnerability is triggered by normal binary-format auto-detection of a small crafted Apple PEF file. The loader could perform up to 268,435,456 relocation-section iterations and repeated buffer operations after record offsets passed the end of the file. This can cause denial of service through excessive CPU consumption and prolonged processing. This issue is fixed in version 6.2.0.

## Affected

- `radare2 < 6.2.0`

## Remediation

Upgrade past the affected range:

- `radare2 6.2.0`