{"id":"CVE-2026-116776","state":"PUBLISHED","title":"USB Test: Heap-based Buffer Overflow in getSectorSize via untrusted DISK_GEOMETRY.BytesPerSector leads to RCE/DoS","description":"USB Test is a lightweight Windows CLI utility for verifying sector integrity and detecting overreported capacity on USB flash drives. Prior to version 1.1.5, getSectorSize() in USB Test/src/driveinfo.cpp trusts DISK_GEOMETRY.BytesPerSector returned by IOCTL_DISK_GET_DRIVE_GEOMETRY without checking whether the call succeeded or enforcing size bounds. USB Test/src/drivetest.cpp uses the value for division and to size a heap buffer before memcpy(buffer.data(), &sector, 8), so a physically connected malicious USB storage device can report a value below eight bytes and cause repeated out-of-bounds writes, or report zero and cause a divide-by-zero denial of service when a user starts a drive test. The heap corruption can crash the elevated application and may permit arbitrary code execution. This issue is fixed in version 1.1.5.","publishedAt":"2026-10-28T15:42:11.023Z","updatedAt":"2026-10-29T18:37:18.070Z","severity":{"score":7,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:P/AC:L/AT:N/PR:H/UI:P/VC:N/VI:H/VA:H/SC:N/SI:H/SA:H","source":"GitHub_M"},"assigner":"GitHub_M","products":["n-romanovich usb-test"],"affected":[{"vendor":"n-romanovich","product":"usb-test","versions":[{"version":"< 1.1.5","status":"affected"}]}],"references":["https://github.com/n-romanovich/usb-test/security/advisories/GHSA-cfrv-c9q2-7cr3","https://github.com/n-romanovich/usb-test/commit/5b6caac844461024520b02337d3a541fbe128f89","https://github.com/n-romanovich/usb-test/releases/tag/release-v1.1.5"],"weaknesses":["CWE-122"],"ingestedAt":"2026-10-29T20:10:43.281Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/116xxx/CVE-2026-116776.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-116776","state":"PUBLISHED","datePublished":"2026-10-28T15:42:11.023Z","dateUpdated":"2026-10-29T18:37:18.070Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-10-26T21:53:35.166Z"},"containers":{"cna":{"title":"USB Test: Heap-based Buffer Overflow in getSectorSize via untrusted DISK_GEOMETRY.BytesPerSector leads to RCE/DoS","descriptions":[{"lang":"en","value":"USB Test is a lightweight Windows CLI utility for verifying sector integrity and detecting overreported capacity on USB flash drives. Prior to version 1.1.5, getSectorSize() in USB Test/src/driveinfo.cpp trusts DISK_GEOMETRY.BytesPerSector returned by IOCTL_DISK_GET_DRIVE_GEOMETRY without checking whether the call succeeded or enforcing size bounds. USB Test/src/drivetest.cpp uses the value for division and to size a heap buffer before memcpy(buffer.data(), &sector, 8), so a physically connected malicious USB storage device can report a value below eight bytes and cause repeated out-of-bounds writes, or report zero and cause a divide-by-zero denial of service when a user starts a drive test. The heap corruption can crash the elevated application and may permit arbitrary code execution. This issue is fixed in version 1.1.5."}],"affected":[{"vendor":"n-romanovich","product":"usb-test","versions":[{"version":"< 1.1.5","status":"affected"}]}],"references":[{"url":"https://github.com/n-romanovich/usb-test/security/advisories/GHSA-cfrv-c9q2-7cr3","name":"https://github.com/n-romanovich/usb-test/security/advisories/GHSA-cfrv-c9q2-7cr3","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/n-romanovich/usb-test/commit/5b6caac844461024520b02337d3a541fbe128f89","name":"https://github.com/n-romanovich/usb-test/commit/5b6caac844461024520b02337d3a541fbe128f89","tags":["x_refsource_MISC"]},{"url":"https://github.com/n-romanovich/usb-test/releases/tag/release-v1.1.5","name":"https://github.com/n-romanovich/usb-test/releases/tag/release-v1.1.5","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"PHYSICAL","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"HIGH","userInteraction":"PASSIVE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"HIGH","subAvailabilityImpact":"HIGH","baseScore":7,"baseSeverity":"HIGH","vectorString":"CVSS:4.0/AV:P/AC:L/AT:N/PR:H/UI:P/VC:N/VI:H/VA:H/SC:N/SI:H/SA:H","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-122","lang":"en","description":"CWE-122: Heap-based Buffer Overflow","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-10-28T15:42:11.023Z"},"source":{"advisory":"GHSA-cfrv-c9q2-7cr3","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/n-romanovich/usb-test/security/advisories/GHSA-cfrv-c9q2-7cr3","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-29T18:36:46.958376Z","id":"CVE-2026-116776","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-29T18:37:18.070Z"}}]}}}