CVE-2025-21069
📋 TL;DR
This vulnerability allows local attackers to read memory outside the intended bounds when parsing image data in Samsung Notes. It affects users of Samsung Notes versions prior to 4.4.30.63 on Samsung mobile devices. The attacker must have local access to the device to exploit this flaw.
💻 Affected Systems
- Samsung Notes
📦 What is this software?
Notes by Samsung
⚠️ Risk & Real-World Impact
Worst Case
An attacker with local access could read sensitive information from adjacent memory, potentially exposing credentials, personal data, or other application secrets.
Likely Case
Local attackers could cause application crashes or read limited memory contents, potentially leading to information disclosure about the application's state.
If Mitigated
With proper access controls and updated software, the vulnerability is effectively neutralized with minimal impact.
🎯 Exploit Status
Exploitation requires local access to the device and specific knowledge of memory layout; no public exploits are known at this time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 4.4.30.63
Vendor Advisory: https://security.samsungmobile.com/serviceWeb.smsb?year=2025&month=10
Restart Required: No
Instructions:
1. Open Samsung Galaxy Store on your device. 2. Search for 'Samsung Notes'. 3. If an update is available, tap 'Update'. 4. Alternatively, enable automatic updates in Galaxy Store settings.
🔧 Temporary Workarounds
Disable Samsung Notes
allTemporarily disable the Samsung Notes application to prevent exploitation until patching is possible.
🧯 If You Can't Patch
- Restrict physical access to devices to prevent local attackers from exploiting the vulnerability.
- Implement application whitelisting to prevent unauthorized execution of Samsung Notes if possible.
🔍 How to Verify
Check if Vulnerable:
Open Samsung Notes app, go to Settings > About Samsung Notes, and check if version is below 4.4.30.63.Check Version:
No command-line option; check via app settings as described.Verify Fix Applied:
After updating, verify the version in Settings > About Samsung Notes shows 4.4.30.63 or higher.📡 Detection & Monitoring
Log Indicators:
- Application crashes of Samsung Notes with memory access violation errors
- Unusual process memory reads in system logs
Network Indicators:
- No network indicators - this is a local vulnerability
SIEM Query:
No specific SIEM query available due to local nature; monitor for Samsung Notes crash events.