Out-of-bounds Read in Radareorg Radare2
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 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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.3 (Low). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Radareorg Radare2 — versions < 6.2.0
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-81881?
- CVE-2026-81881 is a low-severity vulnerability in Radareorg Radare2, classified under Out-of-bounds Read. CVSS score: 3.3/10. Published 2026-09-22.
- How severe is CVE-2026-81881?
- Low severity. CVSS v3 base score is 3.3 out of 10.