{"id":"CVE-2026-81881","title":"radare2 is a UNIX-like reverse engineering framework and command-line toolset","summary":"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 sect…","severity":"low","cvss":3.3,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L","cwe":["CWE-125","CWE-191"],"vendor":"radare","product":"radare2","affected":["radare2 < 6.2.0"],"patched":["radare2 6.2.0"],"published":"2026-09-22","updated":"2026-09-25","sourceUpdated":"2026-09-25T16:49:14.450","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-81881","references":[{"url":"https://github.com/radareorg/radare2/commit/1da6e782df220edf56138ef5fe4f33745b04db74","label":"security-advisories@github.com"},{"url":"https://github.com/radareorg/radare2/issues/26229","label":"security-advisories@github.com"},{"url":"https://github.com/radareorg/radare2/releases/tag/6.2.0","label":"security-advisories@github.com"},{"url":"https://github.com/radareorg/radare2/security/advisories/GHSA-q4w7-225g-64j9","label":"security-advisories@github.com"}],"tags":["nvd","cve.org"],"epss":0.00125,"epssPercentile":0.0186,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-22T17:33:03.527976Z"},"ingestedAt":"2026-09-22T16:06:00.502Z","slug":"CVE-2026-81881","body":"## Overview\n\nradare2 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.\n\n## Affected\n\n- `radare2 < 6.2.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `radare2 6.2.0`","depth":"sunlit","depthScore":18,"depthScoreParts":{"impact":18.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}