CVE-2026-81881
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.
Does this matter?
Lower severity and a low EPSS score (0.17%). Track it; it rarely justifies an emergency change on its own.
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 3.1
- 4.4 MEDIUMCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L
- EPSS
- 0.17% probability · 6th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-125, CWE-191
- Affected
- radare/radare2
- Source
- security-advisories@github.com
EPSS moved from 0.2% on 23 September 2026 to 0.2% on 26 October 2026.
References
- https://github.com/radareorg/radare2/commit/1da6e782df220edf56138ef5fe4f33745b04db74Patch
- https://github.com/radareorg/radare2/issues/26229Exploit, Issue Tracking, Mitigation, Vendor Advisory
- https://github.com/radareorg/radare2/releases/tag/6.2.0Release Notes
- https://github.com/radareorg/radare2/security/advisories/GHSA-q4w7-225g-64j9Patch, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.