{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-10101","assignerOrgId":"dbd8429d-f261-4b1e-94cc-ae3132817e2e","state":"PUBLISHED","assignerShortName":"NLOK","dateReserved":"2025-09-08T10:10:40.173Z","datePublished":"2025-12-01T15:32:31.678Z","dateUpdated":"2026-06-12T22:34:05.090Z"},"containers":{"cna":{"providerMetadata":{"orgId":"dbd8429d-f261-4b1e-94cc-ae3132817e2e","shortName":"GEN","dateUpdated":"2026-06-12T22:34:05.090Z"},"title":"Avast antivirus heap buffer OOB read when scanning a malformed Mach-O file","datePublic":"2025-09-08T17:11:00.000Z","problemTypes":[{"descriptions":[{"lang":"en","cweId":"CWE-125","description":"CWE-125 Out-of-bounds Read","type":"CWE"}]}],"impacts":[{"capecId":"CAPEC-549","descriptions":[{"lang":"en","value":"CAPEC-549 Local Execution of Code"}]}],"affected":[{"vendor":"Gen Digital","product":"Avast Antivirus","platforms":["Windows","macOS","Linux"],"versions":[{"status":"affected","version":"0","lessThan":"25090300","versionType":"custom"}],"defaultStatus":"affected"},{"vendor":"Gen Digital","product":"AVG Antivirus","platforms":["Windows","macOS","Linux"],"versions":[{"status":"affected","version":"0","lessThan":"25090300","versionType":"custom"}],"defaultStatus":"affected"},{"vendor":"Gen Digital","product":"Norton Antivirus","platforms":["Windows","macOS","Linux"],"versions":[{"status":"affected","version":"0","lessThan":"25090300","versionType":"custom"}],"defaultStatus":"affected"},{"vendor":"Gen Digital","product":"Avast One","platforms":["Windows","macOS","Linux"],"versions":[{"status":"affected","version":"0","lessThan":"25090300","versionType":"custom"}],"defaultStatus":"affected"},{"vendor":"Gen Digital","product":"Avast Business Antivirus","platforms":["Windows","macOS","Linux"],"versions":[{"status":"affected","version":"0","lessThan":"25090300","versionType":"custom"}],"defaultStatus":"affected"}],"descriptions":[{"lang":"en","value":"Heap buffer out-of-bounds read vulnerability in Avast Antivirus when scanning a malformed Mach-O file may allow Local Execution of Code or Denial-of-Service of the antivirus process.\n\nThis issue affects Avast Antivirus, AVG Antivirus, Norton Antivirus, Avast One, and Avast Business Antivirus on Windows, macOS, and Linux for virus definition builds before VPS 25090300.\n\n\n\nThe affected scanning logic is delivered through a shared Gen Digital virus definition update stream. The same stream feeds the consumer antivirus products listed in this advisory and other Gen Digital products that embed the same engine. Mitigation flows through this update channel; installations at or above the listed build are not vulnerable regardless of which product consumes the stream.","supportingMedia":[{"type":"text/html","base64":false,"value":"Heap buffer out-of-bounds read vulnerability in Avast Antivirus when scanning a malformed Mach-O file may allow Local Execution of Code or Denial-of-Service of the antivirus process.<p>This issue affects Avast Antivirus, AVG Antivirus, Norton Antivirus, Avast One, and Avast Business Antivirus on Windows, macOS, and Linux for virus definition builds before VPS 25090300.</p><p>The affected scanning logic is delivered through a shared Gen Digital virus definition update stream. The same stream feeds the consumer antivirus products listed in this advisory and other Gen Digital products that embed the same engine. Mitigation flows through this update channel; installations at or above the listed build are not vulnerable regardless of which product consumes the stream.</p>"}]}],"references":[{"url":"https://www.gendigital.com/us/en/contact-us/security-advisories/"}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV3_1":{"version":"3.1","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH","baseSeverity":"HIGH","baseScore":7.8,"vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"}}],"solutions":[{"lang":"en","value":"Install virus definitions VPS 25090300 or any later virus-definition update. All builds at or above VPS 25090300 include the fix; staying current on definitions is required.","supportingMedia":[{"type":"text/html","base64":false,"value":"Install virus definitions <strong>VPS 25090300</strong> or <strong>any later</strong> virus-definition update. All builds at or above VPS 25090300 include the fix; staying current on definitions is required."}]}],"credits":[{"lang":"en","value":"Mike Zhang, an independent security researcher","type":"reporter"}],"source":{"discovery":"EXTERNAL"},"x_generator":{"engine":"Vulnogram 1.0.2"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2025-10101","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"version":"2.0.3","timestamp":"2025-12-02T04:56:02.529916Z"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-02-26T16:57:50.756Z"}}]}}