{"id":"CVE-2026-81881","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-81881","generatedAt":"2026-10-28T03:39:40.205Z","title":"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.","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.","published":"2026-09-22T16:18:03.000Z","lastModified":"2026-09-25T16:49:14.000Z","status":"Analyzed","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":4.4,"severity":"MEDIUM","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L"},"cwe":["CWE-125","CWE-191"],"affected":["radare/radare2"],"epss":{"score":0.00167,"percentile":0.05913,"date":"2026-10-27","history":[{"date":"2026-09-23","score":0.00168,"percentile":0.06436}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.17%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"scored","label":"Newly scored","at":"2026-09-25T18:15:06.000Z","detail":{"from":"3.3","score":"4.4","severity":"MEDIUM","fromSeverity":"LOW"},"summary":"Now scored CVSS 4.4 MEDIUM (was 3.3)."},{"kind":"new","label":"New CVE","at":"2026-09-22T16:18:03.000Z","detail":{"score":"3.3","severity":"LOW","publishedAt":"2026-09-22T16:18:02.910Z"},"summary":"New CVE, medium severity (CVSS 4.4)."}],"references":[{"url":"https://github.com/radareorg/radare2/commit/1da6e782df220edf56138ef5fe4f33745b04db74","tags":["Patch"],"source":"security-advisories@github.com"},{"url":"https://github.com/radareorg/radare2/issues/26229","tags":["Exploit","Issue Tracking","Mitigation","Vendor Advisory"],"source":"security-advisories@github.com"},{"url":"https://github.com/radareorg/radare2/releases/tag/6.2.0","tags":["Release Notes"],"source":"security-advisories@github.com"},{"url":"https://github.com/radareorg/radare2/security/advisories/GHSA-q4w7-225g-64j9","tags":["Patch","Vendor Advisory"],"source":"security-advisories@github.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-81881","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}