CVE-2025-21067
📋 TL;DR
This vulnerability allows local attackers to read memory outside the intended buffer boundaries in Samsung Notes. It affects users of Samsung Notes versions prior to 4.4.30.63 on Samsung mobile devices. The out-of-bounds read could potentially expose sensitive information from adjacent memory regions.
💻 Affected Systems
- Samsung Notes
📦 What is this software?
Notes by Samsung
⚠️ Risk & Real-World Impact
Worst Case
An attacker could read sensitive data from adjacent memory regions, potentially exposing authentication tokens, encryption keys, or other application data.
Likely Case
Information disclosure of limited memory contents, potentially causing application instability or crashes.
If Mitigated
Minimal impact with proper access controls and updated software.
🎯 Exploit Status
Requires local access to the device and knowledge of memory layout. No public exploit code is currently available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 4.4.30.63 or later
Vendor Advisory: https://security.samsungmobile.com/serviceWeb.smsb?year=2025&month=10
Restart Required: No
Instructions:
1. Open Samsung Galaxy Store or Google Play Store on your Samsung device. 2. Search for 'Samsung Notes'. 3. If an update is available, tap 'Update'. 4. Alternatively, enable automatic updates in your app store settings.
🔧 Temporary Workarounds
Disable Samsung Notes
AndroidTemporarily disable the Samsung Notes application to prevent exploitation
Go to Settings > Apps > Samsung Notes > Disable
🧯 If You Can't Patch
- Restrict physical access to devices with vulnerable versions
- Implement application whitelisting to prevent unauthorized app execution
🔍 How to Verify
Check if Vulnerable:
Open Samsung Notes app > Settings > About Samsung Notes > Check version numberCheck Version:
Not applicable - check through app interfaceVerify Fix Applied:
Verify Samsung Notes version is 4.4.30.63 or higher in app settings📡 Detection & Monitoring
Log Indicators:
- Application crashes in Samsung Notes
- Memory access violation logs
Network Indicators:
- No network indicators - local vulnerability only
SIEM Query:
Not applicable - local vulnerability with no network traffic