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CVE-2026-81883

3.3 · LOW

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

Published Sep 22, 2026radareCWE-125EPSS 0.16%

Overview

CVE-2026-81883 is a low-severity vulnerability affecting radare radare2. It was published on September 22, 2026 and has a CVSS 3.1 base score of 3.3 (LOW).

This vulnerability has a CVSS 3.1 base score of 3.3, rated LOW. 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 Lua 5.3 bytecode function parser was vulnerable because the Lua 5.3 bytecode function parser read fixed function-metadata fields immediately after a function-name string without checking the remaining buffer length. The vulnerability is triggered by opening or inspecting a crafted Lua 5.3 bytecode file whose function-name string ends at the input-buffer boundary. The parser read two integers and three one-byte fields beyond the allocated input buffer. This can cause invalid parser results or process termination; no attacker-observable memory disclosure has been demonstrated. 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/26c2eac360033458e9d266e5e30667d1f8d642e3GitHubgithub.com/radareorg/radare2/issues/26228GitHubgithub.com/radareorg/radare2/releases/tag/6.2.0GitHubgithub.com/radareorg/radare2/security/advisories/GHSA-96m5-hvwp-674cGitHubgithub.com/radareorg/radare2/issues/26228

How CyberStrike helps

Frequently asked questions

What is CVE-2026-81883?

CVE-2026-81883 is a low-severity vulnerability affecting radare radare2. It was published on September 22, 2026 and has a CVSS 3.1 base score of 3.3 (LOW).

How severe is CVE-2026-81883?

This vulnerability has a CVSS 3.1 base score of 3.3, rated LOW. 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-2026-81883?

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-2026-81883?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-81883 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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