CVE-2026-81881radare2: Heap out-of-bounds read in radare2 Mach-O Swift metadata parser
Updated under an hour ago ()
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It affects radareorg radare2 and 1 other product. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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Free account, 1 product
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
- 3.3 LOW (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
- Weakness (CWE)
- CWE-125, CWE-191
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Analyzed
- Record last updated
- Sep 22, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
radareorg radare2 radareorg:radare2 (from the name) | before 6.2.0 | CNA record |
radare radare2 radare:radare2 | before 6.2.0 | NVD |
References
- https://github.com/radareorg/radare2/security/advisories/GHSA-q4w7-225g-64j9x-refsource-confirm, patch, vendor-advisory
- https://github.com/radareorg/radare2/issues/26229x-refsource-misc, exploit, issue-tracking, mitigation, vendor-advisory
- https://github.com/radareorg/radare2/commit/1da6e782df220edf56138ef5fe4f33745b04db74x-refsource-misc, patch
- https://github.com/radareorg/radare2/releases/tag/6.2.0x-refsource-misc, release-notes
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.