CVE-2026-21102

Root code execution via undisclosed use-after-free

Published Sep 9, 2026 · Updated Sep 11, 2026

Use-after-free in DualDAR in Samsung Mobile Devices before SMR Sep-2026 Release 1 allows local users to execute code as root. Samsung has not disclosed the freed object, triggering input, or code path in DualDAR; the bulletin states only that the patch adds validation. Exploitation requires high local privileges; successful use crosses the remaining boundary to root and permits arbitrary code execution on the device.

CVSS severity9.3
Critical
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in DualDAR in Samsung Mobile Devices before SMR Sep-2026 Release 1 allows local users to execute code as root. Samsung has not disclosed the freed object, triggering input, or code path in DualDAR; the bulletin states only that the patch adds validation. Exploitation requires high local privileges; successful use crosses the remaining boundary to root and permits arbitrary code execution on the device.

The record

CVE
CVE-2026-21102
Published
Sep 9, 2026
Updated
Sep 11, 2026
Vendor
Samsung Electronics Co., Ltd.
Product
Samsung Mobile Devices
Classifications
CWE-416, T1068
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Sep 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Samsung Electronics Co., Ltd. · Samsung Mobile DevicesAffected versions are unavailable in this record.

Published CVSS scores

9.3Samsung MobileCVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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