CVE-2025-20930
📋 TL;DR
This vulnerability allows local attackers to read out-of-bounds memory in Samsung Notes when parsing JPEG images. Attackers could potentially access sensitive information from adjacent memory locations. Only users of Samsung Notes versions prior to 4.4.26.71 are affected.
💻 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, potentially exposing credentials, encryption keys, or other application data.
Likely Case
Information disclosure of limited memory contents, possibly revealing application state or user data fragments.
If Mitigated
With proper controls, impact is limited to information disclosure within the application's memory space.
🎯 Exploit Status
Requires local access and ability to trigger JPEG parsing in Samsung Notes. No public exploit details available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 4.4.26.71
Vendor Advisory: https://security.samsungmobile.com/serviceWeb.smsb?year=2025&month=03
Restart Required: No
Instructions:
1. Open Galaxy Store or Google Play Store on your Samsung device. 2. Search for 'Samsung Notes'. 3. If update is available, tap 'Update'. 4. Alternatively, enable auto-updates for apps in store settings.
🔧 Temporary Workarounds
Disable Samsung Notes
androidTemporarily disable the Samsung Notes application to prevent JPEG parsing
Restrict JPEG file access
androidPrevent Samsung Notes from accessing JPEG files via file permissions or app settings
🧯 If You Can't Patch
- Restrict local access to devices containing sensitive information
- Implement application whitelisting to prevent unauthorized app execution
🔍 How to Verify
Check if Vulnerable:
Check Samsung Notes version in device settings > Apps > Samsung Notes > App infoCheck Version:
No command line option. Check via device settings or app store.Verify Fix Applied:
Verify Samsung Notes version is 4.4.26.71 or later📡 Detection & Monitoring
Log Indicators:
- Application crashes in Samsung Notes
- Memory access violations in system logs
Network Indicators:
- No network indicators - local vulnerability only
SIEM Query:
No specific SIEM query - monitor for Samsung Notes crash reports or abnormal memory access patterns