Is CVE-2026-81880 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-81880 being exploited in the wild.

How severe is CVE-2026-81880?

Medium severity, with a CVSS score of 5.5, published 22 September 2026.

Is there a fix for CVE-2026-81880?

A patch was published on 2026-08-07. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-81880 attacked?

It is attacked with local access, in a software library.

Am I affected by CVE-2026-81880?

Check whether you run Radare2 or Radare2 at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-81880: radare2 PEF loader denial of service

CVE-2026-81880 · Severity: medium · CVSS 5.5 · Published 2026-09-22

radare2 is a reverse engineering framework that analyzes binary files. A crafted Apple PEF (Preferred Executable Format) binary can trigger unbounded relocation processing, causing the application to consume excessive CPU and hang for extended periods. An attacker can deliver such a malicious file to a security analyst or researcher, disrupting their work and potentially denying access to legitimate analysis.

Technologies: Radare2. Vendors: Radare.

Quick answers

Is CVE-2026-81880 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-81880 being exploited in the wild.
How severe is CVE-2026-81880?: Medium severity, with a CVSS score of 5.5, published 22 September 2026.
Which products and versions are affected?: Radare2 before 6.2.0.
Is there a fix for CVE-2026-81880?: A patch was published on 2026-08-07. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-81880 attacked?: It is attacked with local access, in a software library.
Am I affected by CVE-2026-81880?: Check whether you run Radare2 or Radare2 at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

The PEF loader accepts unbounded relocSecCount values without validating them against the actual number of file sections or relocation records, allowing up to 268 million iterations. A crafted PEF file triggers this vulnerability during normal binary-format auto-detection, causing the loader to perform excessive buffer operations and relocation processing. The vulnerability is fixed in version 6.2.0 by adding bounds checking, overflow validation, and lazy decoding of relocation metadata.

Affected products

radare2 radare2 before 6.2.0

Timeline

2026-09-22: disclosed
2026-08-07: patched

References

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