Process termination via Swift metadata buffer under-read
Published Sep 22, 2026 · Updated Sep 22, 2026
Out-of-bounds read in radare2 before 6.2.0 allows attackers to terminate the process by supplying a crafted Mach-O file. The Mach-O Swift field-metadata parser subtracts a relative field pointer below the section base, then uses the negative logical index to read four bytes before its allocated buffer. Exploitation requires a user or automated workflow to inspect the file; demonstrated effects are incorrect metadata processing or process termination, not observable memory disclosure.
Summary
What happened
Out-of-bounds read in radare2 before 6.2.0 allows attackers to terminate the process by supplying a crafted Mach-O file. The Mach-O Swift field-metadata parser subtracts a relative field pointer below the section base, then uses the negative logical index to read four bytes before its allocated buffer. Exploitation requires a user or automated workflow to inspect the file; demonstrated effects are incorrect metadata processing or process termination, not observable memory disclosure.
The record
- CVE
- CVE-2026-81881
- Published
- Sep 22, 2026
- Updated
- Sep 22, 2026
- Vendor
- radareorg
- Product
- radare2
- Classifications
- T1204.002
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Sep 22, 2026CVE publishedPublication date reported by the CVE source.
- Sep 22, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=< 6.2.0
What conditions does exploitation require?
What is affected?
Published CVSS scores
No CVSS assessment is available in this record.
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Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Activity data is delayed. The latest report is Sep 28, 2026.
Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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