Out-of-bounds write in libsthmbc.so prior to One UI 8.5 allows local attackers to write out-of-bounds memory.

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00099.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Samsung Mobile libsthmbc affected
Version Status Constraints
One UI 8.5 unaffected < *

No data.

No data.

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Project Subscriptions

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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://security.samsungmobile.com/serviceWeb.smsb?year=2026&month=09 cve-icon cve-icon
History

Wed, 09 Sep 2026 11:15:00 +0000

Type Values Removed Values Added
Title Out-of-Bounds Write in Samsung libsthmbc Allows Local Memory Corruption
Weaknesses CWE-119
CWE-787

Wed, 09 Sep 2026 05:00:00 +0000

Type Values Removed Values Added
Description Out-of-bounds write in libsthmbc.so prior to One UI 8.5 allows local attackers to write out-of-bounds memory.
References
Metrics cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: SamsungMobile

Published:

Updated: 2026-09-09T04:48:01.536Z

Reserved: 2025-12-11T01:33:35.830Z

Link: CVE-2026-21111

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-09T05:17:23.640

Modified: 2026-09-09T15:45:14.503

Link: CVE-2026-21111

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-09T11:00:08Z

Weaknesses