Samsung Notes up to 4.4.29.23 SPI Decoder out-of-bounds write

CVSS Meta Temp Score
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CTI Interest Score
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4.9$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in Samsung Notes. Impacted is an unknown function of the component SPI Decoder. Such manipulation leads to out-of-bounds write. This vulnerability is referenced as CVE-2025-21070. The attack can only be performed from a local environment. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Samsung Notes. It has been rated as critical. Affected by this issue is an unknown functionality of the component SPI Decoder. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. Using CWE to declare the problem leads to CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Out-of-bounds write in the SPI decoder in Samsung Notes prior to version 4.4.30.63 allows local attackers to write out-of-bounds memory.

The advisory is shared for download at security.samsungmobile.com. This vulnerability is handled as CVE-2025-21070 since 11/06/2024. The exploitation is known to be easy. The attack needs to be approached locally. There are neither technical details nor an exploit publicly available.

Upgrading to version 4.4.30.63 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-33663). Once again VulDB remains the best source for vulnerability data.

Productinfo

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Vendor

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Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.9
VulDB Meta Temp Score: 4.9

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔒

CNA Base Score: 4.0
CNA Vector (SamsungMobile): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Out-of-bounds write
CWE: CWE-787 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Notes 4.4.30.63

Timelineinfo

11/06/2024 CVE reserved
10/10/2025 +337 days Advisory disclosed
10/10/2025 +0 days VulDB entry created
10/16/2025 +6 days VulDB entry last update

Sourcesinfo

Vendor: samsung.com

Advisory: security.samsungmobile.com
Status: Confirmed

CVE: CVE-2025-21070 (🔒)
GCVE (CVE): GCVE-0-2025-21070
GCVE (VulDB): GCVE-100-327860
EUVD: 🔒

Entryinfo

Created: 10/10/2025 08:51
Updated: 10/16/2025 20:51
Changes: 10/10/2025 08:51 (65), 10/10/2025 11:00 (1), 10/16/2025 20:51 (11)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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