{"id":"CVE-2026-81881","state":"PUBLISHED","title":"radare2: Heap out-of-bounds read in radare2 Mach-O Swift metadata parser","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.","publishedAt":"2026-09-22T15:05:21.940Z","updatedAt":"2026-09-22T17:44:38.856Z","severity":{"score":3.3,"label":"Low","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L","source":"GitHub_M"},"assigner":"GitHub_M","products":["radareorg radare2"],"affected":[{"vendor":"radareorg","product":"radare2","versions":[{"version":"< 6.2.0","status":"affected"}]}],"references":["https://github.com/radareorg/radare2/security/advisories/GHSA-q4w7-225g-64j9","https://github.com/radareorg/radare2/issues/26229","https://github.com/radareorg/radare2/commit/1da6e782df220edf56138ef5fe4f33745b04db74","https://github.com/radareorg/radare2/releases/tag/6.2.0"],"weaknesses":["CWE-125","CWE-191"],"ingestedAt":"2026-10-29T20:13:15.269Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/81xxx/CVE-2026-81881.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-81881","state":"PUBLISHED","datePublished":"2026-09-22T15:05:21.940Z","dateUpdated":"2026-09-22T17:44:38.856Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-08-27T17:48:42.122Z"},"containers":{"cna":{"title":"radare2: Heap out-of-bounds read in radare2 Mach-O Swift metadata parser","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"radareorg","product":"radare2","versions":[{"version":"< 6.2.0","status":"affected"}]}],"references":[{"url":"https://github.com/radareorg/radare2/security/advisories/GHSA-q4w7-225g-64j9","name":"https://github.com/radareorg/radare2/security/advisories/GHSA-q4w7-225g-64j9","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/radareorg/radare2/issues/26229","name":"https://github.com/radareorg/radare2/issues/26229","tags":["x_refsource_MISC"]},{"url":"https://github.com/radareorg/radare2/commit/1da6e782df220edf56138ef5fe4f33745b04db74","name":"https://github.com/radareorg/radare2/commit/1da6e782df220edf56138ef5fe4f33745b04db74","tags":["x_refsource_MISC"]},{"url":"https://github.com/radareorg/radare2/releases/tag/6.2.0","name":"https://github.com/radareorg/radare2/releases/tag/6.2.0","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"LOW","baseScore":3.3,"baseSeverity":"LOW","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-125","lang":"en","description":"CWE-125: Out-of-bounds Read","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-191","lang":"en","description":"CWE-191: Integer Underflow (Wrap or Wraparound)","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-09-22T15:05:21.940Z"},"source":{"advisory":"GHSA-q4w7-225g-64j9","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-22T17:33:03.527976Z","id":"CVE-2026-81881","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-22T17:44:38.856Z"}}]}}}