Vulnerability Description
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.
CVSS Score
LOW
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Radare | Radare2 | < 6.2.0 |
Related Weaknesses (CWE)
References
- https://github.com/radareorg/radare2/commit/1da6e782df220edf56138ef5fe4f33745b04Patch
- https://github.com/radareorg/radare2/issues/26229ExploitIssue TrackingMitigation
- https://github.com/radareorg/radare2/releases/tag/6.2.0Release Notes
- https://github.com/radareorg/radare2/security/advisories/GHSA-q4w7-225g-64j9PatchVendor Advisory
FAQ
What is CVE-2026-81881?
CVE-2026-81881 is a vulnerability with a CVSS score of 3.3 (LOW). 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 ...
How severe is CVE-2026-81881?
CVE-2026-81881 has been rated LOW with a CVSS base score of 3.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-81881?
Check the references section above for vendor advisories and patch information. Affected products include: Radare Radare2.