CVE-2026-116776

USB Test: Heap-based Buffer Overflow in getSectorSize via untrusted DISK_GEOMETRY.BytesPerSector leads to RCE/DoS

CVSS score

7.0

EPSS probability

—

Risk score

0.7

Published

2 h ago

Overview Public Exploits (0)Newsroom Vulnerability Timeline

Patch status has not yet been verified

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Impact on My Inventory

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Vulnerability description

DayBreach AI Explanation

Verified against sources

Heap-based Buffer Overflow Vulnerability in USB Test

Sources read

Source agreement

Tam uyum

Evidence confidence

%55

Short explanation

A heap-based buffer overflow vulnerability exists in USB Test prior to version 1.1.5 due to unverified DISK_GEOMETRY.BytesPerSector values. A physically connected malicious USB storage device can cause heap corruption, leading to denial of service or arbitrary code execution.

Why does it matter?

This vulnerability poses a security risk because it can cause heap corruptions that may lead to the crash or compromise of an elevated application.

What should be done?

Update to version 1.1.5 or later
Follow vendor security advisories
Avoid connecting untrusted physical USB devices

Chain of evidence and sources2 verified claims

USB Test 1.1.5 öncesi sürümlerde getSectorSize işlevi, DISK_GEOMETRY.BytesPerSector değerini kontrol etmeden güvenmektedir.

S0 · daybreach-canonical S1 · cvelist

Kötü amaçlı bir USB depolama aygıtı sıfır değer bildirerek sıfıra bölme hizmet reddine neden olabilir.

S0 · daybreach-canonical S1 · cvelist

Show the technical text from the sources

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.

CVSS 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

CWE: CWE-122

This explanation was compiled automatically from the source records. Scores, active exploitation, patch and exploit status come straight from the sources.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-116776 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

ID	VENDOR	PRODUCT	ACTION
1	n-romanovich	usb-test	View

Total affected vendors: 1|Products: 1

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCORE	VERSION	SEVERITY	VECTOR	SOURCE
7.0	CVSS V4_0	HIGH	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	CVE CNA
7.0	CVSS V40	HIGH	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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X	NVD

Patch and Remediation Guide

Solution & Remediation Advisory

Patch status unknown

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Confirm the affected product and version against the source evidence above.

Restrict access to internet-facing services and apply network segmentation.

Until a patch is confirmed, follow the vendor advisory; do not read an unknown status as “no patch”.

Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-116776 is associated with the following CWEs:

CWE-122: Common Weakness Enumeration Entry CWE-122

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-116776 weaknesses.

CAPEC-66: SQL Injection CAPEC-126: Path Traversal CAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureFiziksel

PermissionsHigh

User—

Official Sources and Advisories

https://github.com/n-romanovich/usb-test/security/advisories/GHSA-cfrv-c9q2-7cr3vendor-advisory https://github.com/n-romanovich/usb-test/commit/5b6caac844461024520b02337d3a541fbe128f89vendor-advisory https://github.com/n-romanovich/usb-test/releases/tag/release-v1.1.5vendor-advisory

CVSS Vector Radar Chart

7.0 / 10

Vulnerability Scoring Details

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

Attack VectorPhysical

Attack ComplexityLow

Privileges RequiredHigh privileges

User InteractionP

Confidentiality (Gizlilik)Low

Integrity (Bütünlük)P

Availability (Erişilebilirlik)High

Yama durumu bilinmiyor

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Follow the vendor

n-romanovich

Weakness Type (CWE & CAPEC)

CWE-122

Get this vulnerability through the API

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