CVE-2026-20412
📋 TL;DR
CVE-2026-20412 is an out-of-bounds write vulnerability in the cameraisp component that allows local privilege escalation. Attackers with initial System privilege access can exploit this without user interaction to gain higher privileges. This affects devices using MediaTek chipsets with vulnerable camera ISP firmware.
💻 Affected Systems
- MediaTek chipset devices with cameraisp component
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing attackers to execute arbitrary code with kernel privileges, potentially installing persistent malware or accessing all system data.
Likely Case
Local privilege escalation from System to kernel-level access, enabling further system manipulation and persistence mechanisms.
If Mitigated
Limited impact if proper privilege separation and SELinux/app sandboxing are enforced, though kernel compromise remains possible.
🎯 Exploit Status
Requires System privilege first, then exploitation involves triggering the bounds check bypass. No user interaction needed once initial access obtained.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Patch ID: ALPS10351676
Vendor Advisory: https://corp.mediatek.com/product-security-bulletin/February-2026
Restart Required: Yes
Instructions:
1. Contact device manufacturer for firmware update containing patch ALPS10351676. 2. Apply firmware update through official channels. 3. Reboot device after update completion.
🔧 Temporary Workarounds
Restrict System Privilege Access
androidLimit which applications and users can obtain System privilege through SELinux policies and app sandboxing.
Review and tighten SELinux policies: getenforce
Audit apps with system privileges: pm list packages -f
🧯 If You Can't Patch
- Implement strict application sandboxing and SELinux enforcement to limit System privilege access
- Monitor for suspicious privilege escalation attempts and restrict camera hardware access to trusted applications only
🔍 How to Verify
Check if Vulnerable:
Check device firmware version against manufacturer's patched versions; examine if cameraisp component is present and vulnerable.Check Version:
Check firmware/build version: getprop ro.build.fingerprintVerify Fix Applied:
Verify patch ALPS10351676 is applied in firmware version and test camera functionality remains operational.📡 Detection & Monitoring
Log Indicators:
- Unexpected privilege escalation attempts
- Camera ISP component crashes or abnormal behavior
- SELinux denials related to cameraisp
Network Indicators:
- Not network exploitable; focus on local system monitoring
SIEM Query:
Process elevation from System to kernel context without legitimate cause OR Camera ISP component access violations