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Samsung DualDAR CVE-2026-21102

| EUVDEUVD-2026-74643 CRITICAL
Use After Free (CWE-416)
2026-09-09 SamsungMobile GHSA-92xv-9mxj-7x26
9.3
CVSS 4.0 · Vendor: SamsungMobile
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Severity by source

Vendor (SamsungMobile) PRIMARY
9.3 CRITICAL
CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/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
vuln.today AI
8.2 HIGH

Local vector and pre-existing high privileges (AV:L/PR:H) for a UAF that yields root; scope changed (S:C) as it breaks out of a privileged component into full system compromise with high C/I/A.

3.1 AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
4.0 AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

Primary rating from Vendor (SamsungMobile).

CVSS VectorVendor: SamsungMobile

Attack Vector
Local
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
X

Lifecycle Timeline

2
Analysis Generated
Sep 09, 2026 - 08:15 vuln.today
CVE Published
Sep 09, 2026 - 04:47 cve.org
CRITICAL 9.3

DescriptionCVE.org

Use after free in DualDAR prior to SMR Sep-2026 Release 1 allows local privileged attackers to execute arbitrary code with root privilege.

AnalysisAI

Local privilege escalation to root in Samsung's DualDAR (Dual Data-at-Rest) encryption component affects Samsung mobile devices running Android 14, 15, 16, and 17 prior to the SMR (Samsung Maintenance Release) Sep-2026 Release 1. A use-after-free condition lets a local attacker who already holds elevated privileges execute arbitrary code as root, fully compromising the device. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
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Delivery
technique details hidden
Exploit
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Execution
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Impact
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Vulnerability AssessmentAI

Exploitation Requires local access to the device and pre-existing high privileges (CVSS PR:H, AV:L) - the attacker must control a privileged process capable of reaching the DualDAR component, and the DualDAR (Dual Data-at-Rest) encryption feature must be present/active on the target. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 score of 9.3 is driven by the scope/subsequent-system impact metrics (SC:H/SI:H/SA:H) plus full VC:H/VI:H/VA:H, but the vector itself qualifies the real-world risk: AV:L means physical or local shell access is required, and PR:H means the attacker must already hold high privileges before exploiting - this is a privilege-escalation/sandbox-breakout primitive, not a remote drive-by. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Vendor-released patch: SMR Sep-2026 Release 1 - apply the September 2026 Samsung Maintenance Release firmware update to all affected Android 14/15/16/17 Galaxy devices via System Update or your MDM/Knox management console, per Samsung's bulletin at https://security.samsungmobile.com/securityUpdate.smsb?year=2026&month=09. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 24 hours, inventory all Samsung mobile devices running Android 14-17 in your enterprise environment, determine affected device count, and note any devices running applications requiring elevated privileges. …

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CVE-2026-21102 vulnerability details – vuln.today

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