CVE-2024-48883
📋 TL;DR
This vulnerability in Samsung Exynos processors allows information leakage when a malformed uplink scheduling message is incorrectly handled. It affects Samsung mobile devices, wearables, and modems using the listed Exynos chips. The leak could expose sensitive device information to attackers.
💻 Affected Systems
- Samsung Mobile Processor
- Samsung Wearable Processor
- Samsung Modem Exynos 9820
- Exynos 9825
- Exynos 980
- Exynos 990
- Exynos 850
- Exynos 1080
- Exynos 2100
- Exynos 1280
- Exynos 2200
- Exynos 1330
- Exynos 1380
- Exynos 1480
- Exynos 2400
- Exynos 9110
- Exynos W920
- Exynos W930
- Exynos W1000
- Modem 5123
- Modem 5300
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Sensitive device information (potentially including location data, IMSI, or other identifiers) could be exfiltrated to an attacker with network access.
Likely Case
Limited information disclosure about the UE (User Equipment) such as device identifiers or configuration details.
If Mitigated
With proper network segmentation and monitoring, impact would be limited to information disclosure within controlled network segments.
🎯 Exploit Status
Exploitation requires sending specially crafted uplink scheduling messages to the vulnerable modem. No public exploit code is known at this time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Device-specific security updates from Samsung
Vendor Advisory: https://semiconductor.samsung.com/support/quality-support/product-security-updates/cve-2024-48883/
Restart Required: Yes
Instructions:
1. Check for security updates in device settings. 2. Install available updates from Samsung. 3. Restart device after installation. 4. Verify patch installation in security settings.
🔧 Temporary Workarounds
Disable vulnerable network features
allLimit exposure by disabling unnecessary cellular network features if possible
Network segmentation
allSegment devices from untrusted networks using firewalls and access controls
🧯 If You Can't Patch
- Isolate affected devices on separate network segments with strict firewall rules
- Implement network monitoring for unusual uplink scheduling patterns
🔍 How to Verify
Check if Vulnerable:
Check device model and processor in Settings > About phone. Compare with affected products list.Check Version:
Settings > About phone > Software information > Build number / Security patch levelVerify Fix Applied:
Check security patch level in Settings > Security > Security updates. Verify latest Samsung security updates are installed.📡 Detection & Monitoring
Log Indicators:
- Unusual modem/baseband processor errors
- Unexpected information disclosure in modem logs
Network Indicators:
- Malformed uplink scheduling messages
- Unusual cellular network traffic patterns
SIEM Query:
Search for modem/baseband error codes related to uplink scheduling or information leakage