---
id: CVE-2026-81885
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 NE relocation fixup-chain parser was vulnerable
  because the NE relocation parser followed fixup chains without an active
  iteration l…
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-770
  - CWE-835
vendor: radare
product: radare2
affected:
  - radare2 < 6.2.0
patched:
  - radare2 6.2.0
published: '2026-09-22'
updated: '2026-09-28'
sourceUpdated: '2026-09-28T13:27:09.277'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-81885'
references:
  - url: >-
      https://github.com/radareorg/radare2/commit/93d794caa7c2f08413106255d49546e544c1f9f0
    label: security-advisories@github.com
  - url: 'https://github.com/radareorg/radare2/issues/26225'
    label: security-advisories@github.com
  - url: 'https://github.com/radareorg/radare2/pull/26192'
    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-43wr-4j49-rcxj
    label: security-advisories@github.com
  - url: 'https://github.com/radareorg/radare2/issues/26225'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - cve.org
  - exploit-available
epss: 0.00165
epssPercentile: 0.05648
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-25T23:30:34.248880Z'
ingestedAt: '2026-09-22T16:06:00.499Z'
---

## Overview

radare2 is a UNIX-like reverse engineering framework and command-line toolset. Prior to 6.2.0, radare2's NE relocation fixup-chain parser was vulnerable because the NE relocation parser followed fixup chains without an active iteration limit or cycle detection. The vulnerability is triggered by opening a crafted NE executable whose in-bounds relocation entry points back to itself instead of reaching 0xffff. The parser repeatedly processed the same relocation and allocated another relocation object on each iteration. This can cause denial of service through continuous CPU and memory consumption. This issue is fixed in version 6.2.0.

## Affected

- `radare2 < 6.2.0`

## Remediation

Upgrade past the affected range:

- `radare2 6.2.0`