{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-20478","assignerOrgId":"ee979b05-11f8-4f25-a7e0-a1fa9c190374","state":"PUBLISHED","assignerShortName":"MediaTek","dateReserved":"2025-11-03T01:30:59.021Z","datePublished":"2026-08-03T02:05:35.499Z","dateUpdated":"2026-08-03T19:08:03.304Z"},"containers":{"cna":{"providerMetadata":{"orgId":"ee979b05-11f8-4f25-a7e0-a1fa9c190374","shortName":"MediaTek","dateUpdated":"2026-08-03T02:05:35.499Z"},"descriptions":[{"lang":"en","value":"In Audio HAL, there is a possible out of bounds write due to a heap buffer overflow. This could lead to local denial of service with User execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS10981454 (Note: For MT6880, MT6890, MT6988, MT6990) / AUTO00851293 (Note: For MT2735, MT2737); Issue ID: MSV-7638."}],"affected":[{"vendor":"MediaTek, Inc.","product":"MediaTek chipset","defaultStatus":"unaffected","versions":[{"version":"MT2735","status":"affected"},{"version":"MT2737","status":"affected"},{"version":"MT6880","status":"affected"},{"version":"MT6890","status":"affected"},{"version":"MT6988","status":"affected"},{"version":"MT6990","status":"affected"}]}],"references":[{"url":"https://www.mediatek.com/product-security-bulletin/August-2026"}],"problemTypes":[{"descriptions":[{"type":"CWE","lang":"en","cweId":"CWE-787","description":"CWE-787 Out-of-bounds Write"}]}],"x_generator":{"engine":"cvelib 1.8.0"}},"adp":[{"metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":5.5,"attackVector":"LOCAL","baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","integrityImpact":"NONE","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"LOW","confidentialityImpact":"NONE"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-08-03T19:07:42.962735Z","id":"CVE-2026-20478","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-08-03T19:08:03.304Z"}}]}}