CVE-2026-81881: radare2 is a UNIX-like reverse engineering framework and command-line toolset. Prior to 6.2.0, radare2's Mach-O Swift…
CVE-2026-81881 · Severity: low · CVSS 3.3 · Published 2026-09-22
radare2 is a UNIX-like reverse engineering framework and command-line toolset. Prior to 6.2.0, radare2's Mach-O Swift field-metadata parser was vulnerable because a relative Swift field pointer could be lower than the field-metadata section base, making subtraction produce a negative logical index. The vulnerability is triggered by parsing Swift type and class metadata from a crafted Mach-O file. The derived index was used to read four bytes immediately before the allocated field-metadata buffer. This can cause incorrect metadata processing or process termination; no attacker-observable memory disclosure has been demonstrated. This issue is fixed in version 6.2.0.
No. Junglewise Threat Intelligence has no report of CVE-2026-81881 being exploited in the wild.
How severe is CVE-2026-81881?
Low severity, with a CVSS score of 3.3, published 22 September 2026.
Which products and versions are affected?
Radare2. The advisory does not name versions.
Is there a fix for CVE-2026-81881?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
Am I affected by CVE-2026-81881?
Check whether you run Radare2. 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.