CVE-2026-21125 - Vulnerability Details - OpenCVE

Improper input validation in parsing sheifd in libsimba.heifdec.media.samsung.so prior to SMR Oct-2026 Release 1 allows local attackers to potentially execute arbitrary code.

Attack Vector Local

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact High

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.

Exploitation none

Automatable no

Technical Impact total

Vendors	Products
Samsung Mobile	Samsung Mobile Devices

No data.

No data.

References

Link	Providers
https://security.samsungmobile.com/securityUpdate.smsb?year=2026&month=10

History

Mon, 12 Oct 2026 15:30:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}`

Mon, 12 Oct 2026 07:45:00 +0000

Type	Values Removed	Values Added
Title		Improper Input Validation Leading to Local Arbitrary Code Execution in Samsung’s HEIF Decoder
Weaknesses		CWE-20

Mon, 12 Oct 2026 07:00:00 +0000

Type	Values Removed	Values Added
First Time appeared		Samsung Mobile Samsung Mobile samsung Mobile Devices
Vendors & Products		Samsung Mobile Samsung Mobile samsung Mobile Devices

Mon, 12 Oct 2026 05:00:00 +0000

Type	Values Removed	Values Added
Description		Improper input validation in parsing sheifd in libsimba.heifdec.media.samsung.so prior to SMR Oct-2026 Release 1 allows local attackers to potentially execute arbitrary code.
References		https://security.samsungmobile.com/securityUpdate.smsb?year=2026&month=10
Metrics		cvssV4_0 `{'score': 8.6, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}`

MITRE

Status: PUBLISHED

Assigner: SamsungMobile

Published: 2026-10-12T04:57:41.717Z

Updated: 2026-10-13T03:55:32.409Z

Reserved: 2025-12-11T01:33:35.832Z

Link: CVE-2026-21125

Vulnrichment

Updated: 2026-10-12T14:05:33.792Z

NVD

Status : Awaiting Analysis

Published: 2026-10-12T05:17:01.093

Modified: 2026-10-14T20:13:37.910

Link: CVE-2026-21125

Redhat

No data.

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