CVE-2025-20914
📋 TL;DR
An out-of-bounds read vulnerability in Samsung Notes' handwriting content processing allows attackers to read memory beyond allocated boundaries. This affects Samsung Notes users on Android devices with versions prior to 4.4.26.71. The vulnerability could expose sensitive information from device memory.
💻 Affected Systems
- Samsung Notes
📦 What is this software?
Notes by Samsung
⚠️ Risk & Real-World Impact
Worst Case
Attackers could read sensitive data from device memory including authentication tokens, passwords, or other application data, potentially leading to account compromise or data theft.
Likely Case
Information disclosure of random memory contents, potentially exposing fragments of sensitive data or causing application instability.
If Mitigated
Limited information exposure with no direct code execution or privilege escalation.
🎯 Exploit Status
Requires user interaction to open malicious handwriting content. No known public exploits.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 4.4.26.71 and later
Vendor Advisory: https://security.samsungmobile.com/serviceWeb.smsb?year=2025&month=03
Restart Required: No
Instructions:
1. Open Google Play Store on Android device. 2. Search for 'Samsung Notes'. 3. If update available, tap 'Update'. 4. Alternatively, update through Galaxy Store if installed.
🔧 Temporary Workarounds
Disable Samsung Notes
androidTemporarily disable or uninstall Samsung Notes app until patched.
adb shell pm disable-user --user 0 com.samsung.android.app.notes
Avoid unknown handwriting files
allDo not open handwriting content from untrusted sources.
🧯 If You Can't Patch
- Restrict app installation to trusted sources only
- Implement mobile device management (MDM) to control app usage
🔍 How to Verify
Check if Vulnerable:
Check Samsung Notes version in app settings or Google Play Store.Check Version:
adb shell dumpsys package com.samsung.android.app.notes | grep versionNameVerify Fix Applied:
Confirm Samsung Notes version is 4.4.26.71 or higher.📡 Detection & Monitoring
Log Indicators:
- Application crashes in Samsung Notes
- Memory access violation logs
Network Indicators:
- No network indicators - local vulnerability
SIEM Query:
No specific SIEM query - monitor for app crashes or abnormal memory access