CVE-2024-23383
📋 TL;DR
CVE-2024-23383 is a use-after-free vulnerability in Qualcomm kernel drivers that allows memory corruption when hardware fences are triggered. This could enable local privilege escalation or denial of service attacks. Affected systems include devices with Qualcomm chipsets running vulnerable kernel drivers.
💻 Affected Systems
- Qualcomm chipsets with vulnerable kernel drivers
📦 What is this software?
Snapdragon 4 Gen 1 Mobile Platform Firmware by Qualcomm
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Snapdragon 480 5g Mobile Platform Firmware by Qualcomm
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Snapdragon 480\+ 5g Mobile Platform \(sm4350 Ac\) Firmware by Qualcomm
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Snapdragon 695 5g Mobile Platform Firmware by Qualcomm
View all CVEs affecting Snapdragon 695 5g Mobile Platform Firmware →
Snapdragon 8 Gen 3 Mobile Platform Firmware by Qualcomm
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Snapdragon W5\+ Gen 1 Wearable Platform Firmware by Qualcomm
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Video Collaboration Vc1 Platform Firmware by Qualcomm
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Video Collaboration Vc3 Platform Firmware by Qualcomm
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⚠️ Risk & Real-World Impact
Worst Case
Local attacker gains kernel-level privileges, leading to complete system compromise, data theft, or persistent backdoor installation.
Likely Case
Local privilege escalation allowing attackers to bypass security controls and execute arbitrary code with elevated permissions.
If Mitigated
Denial of service through kernel panic or system crash if exploitation fails or is partially mitigated.
🎯 Exploit Status
Requires local access and kernel driver interaction. No public exploit available as of analysis.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Refer to Qualcomm August 2024 security bulletin for specific patched versions
Vendor Advisory: https://docs.qualcomm.com/product/publicresources/securitybulletin/august-2024-bulletin.html
Restart Required: Yes
Instructions:
1. Check Qualcomm advisory for your specific chipset. 2. Obtain updated firmware/drivers from device manufacturer. 3. Apply patches following vendor instructions. 4. Reboot system to load patched kernel modules.
🔧 Temporary Workarounds
Disable vulnerable kernel module
linuxPrevent loading of the affected Qualcomm kernel driver if not required
echo "blacklist <vulnerable_module>" >> /etc/modprobe.d/blacklist.conf
rmmod <vulnerable_module>
🧯 If You Can't Patch
- Restrict local user access and implement strict privilege separation
- Monitor for unusual kernel module loading or privilege escalation attempts
🔍 How to Verify
Check if Vulnerable:
Check kernel module version: lsmod | grep -i qualcomm and compare with patched versions in advisoryCheck Version:
modinfo <qualcomm_module_name> | grep versionVerify Fix Applied:
Verify kernel module version matches patched version from Qualcomm bulletin📡 Detection & Monitoring
Log Indicators:
- Kernel panic logs
- Unexpected kernel module loading
- Privilege escalation attempts in audit logs
Network Indicators:
- None - local vulnerability only
SIEM Query:
source="kernel" AND ("panic" OR "oops") OR event_type="privilege_escalation"