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CVE-2026-81880

5.5 · MEDIUM

radare2 is a UNIX-like reverse engineering framework and command-line toolset.

Published Sep 22, 2026radareCWE-400EPSS 0.14%

Overview

CVE-2026-81880 is a medium-severity vulnerability affecting radare radare2. It was published on September 22, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

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.

Remediation

Check the references section for vendor advisories and patches from radare. Update radare2 to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus
radareradare2>= 0, < 6.2.0Affected

References

GitHubgithub.com/radareorg/radare2/commit/87c780e29ee6251cebaab51585d14482cb7740acGitHubgithub.com/radareorg/radare2/releases/tag/6.2.0GitHubgithub.com/radareorg/radare2/security/advisories/GHSA-fg6f-rj8g-25pq

How CyberStrike helps

Frequently asked questions

What is CVE-2026-81880?

CVE-2026-81880 is a medium-severity vulnerability affecting radare radare2. It was published on September 22, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2026-81880?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-81880?

Check the references section for vendor advisories and patches from radare. Update radare2 to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-81880?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-81880 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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