CVE-2026-18909

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-18909
StatePUBLISHED
AssignerELAN
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-06 05:16:40 UTC
Updated2026-10-23 21:10:00 UTC
DescriptionA stack-based buffer overflow vulnerability exists in ELAN Microelectronics Corp. ELAN Smart-Pad on Windows (ETD.sys and ETDSMBus.sys). During Intel SMBus recovery, ETDSMBus.sys does not enforce an upper-bound check on the hardware-derived report count, allowing an out-of-range value to be forwarded to ETD.sys where it is used as a loop counter for a stack buffer copy without destination size validation. A local attacker with standard user privileges can trigger a kernel bugcheck (BSOD 0xF7 DRIVER_OVERRAN_STACK_BUFFER), resulting in denial of service. This issue affects ELAN Smart-Pad through ETD24.21.52.3.

Risk And Classification

Primary CVSS: v4.0 5.6 MEDIUM from 36106deb-8e95-420b-a0a0-e70af5d245df

CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:P/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:N/R:U/V:X/RE:X/U:X

EPSS: 0.001110000 probability, percentile 0.012850000 (date 2026-10-23)

Problem Types: CWE-121 | CWE-121 CWE-121 Stack-based buffer overflow

VersionSourceTypeScoreSeverityVector
4.036106deb-8e95-420b-a0a0-e70af5d245dfSecondary5.6MEDIUMCVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:P/C...
4.0CNACVSS5.6MEDIUMCVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:P/A...
3.136106deb-8e95-420b-a0a0-e70af5d245dfSecondary4.7MEDIUMCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
3.1CNACVSS4.7MEDIUMCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS v4.0 Breakdown

Attack Vector
Local
Attack Complexity
High
Attack Requirements
Present
Privileges Required
Low
User Interaction
None
Confidentiality
None
Integrity
None
Availability
High
Sub Conf.
None
Sub Integrity
None
Sub Availability
High

CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:P/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:N/R:U/V:X/RE:X/U:X

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA ELAN Microelectronics Corp. ELAN Smart-Pad affected ETD24.21.52.3 custom Windows

References

ReferenceSourceLinkTags
www.emc.com.tw/emc/tw/vulnerability-disclosure-policy 36106deb-8e95-420b-a0a0-e70af5d245df www.emc.com.tw
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Additional Advisory Data

Solutions

CNA: Update to ETD driver version to ETD24.21.53.3 or later.

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