CVE-2026-20415 Overview
CVE-2026-20415 is a memory corruption vulnerability in the MediaTek imgsys component affecting Android devices powered by specific MediaTek chipsets. The vulnerability arises from improper locking mechanisms within the image processing subsystem, which can lead to race conditions and subsequent memory corruption. When exploited by an attacker who has already obtained System privileges, this flaw enables a local denial of service condition without requiring any user interaction.
Critical Impact
Attackers with System privileges can trigger memory corruption in the imgsys component, causing device instability and denial of service conditions on affected Android devices using MediaTek MT6897 and MT6989 chipsets.
Affected Products
- Google Android 15.0
- MediaTek MT6897 chipset
- MediaTek MT6989 chipset
Discovery Timeline
- February 2, 2026 - CVE-2026-20415 published to NVD
- February 3, 2026 - Last updated in NVD database
Technical Details for CVE-2026-20415
Vulnerability Analysis
This vulnerability is classified under CWE-415 (Double Free) and CWE-667 (Improper Locking), indicating a fundamental flaw in resource synchronization within the imgsys driver component. The imgsys subsystem handles image processing operations on MediaTek-powered Android devices, and the improper locking implementation creates a window where concurrent access to shared memory resources can occur without proper synchronization.
The attack requires local access and low-privilege requirements for initial execution, though the attacker must already possess System-level privileges to successfully exploit the vulnerability. The impact is isolated to availability, causing denial of service without affecting data confidentiality or integrity.
Root Cause
The root cause lies in improper locking mechanisms within the imgsys driver. When multiple threads or processes attempt to access or modify shared memory structures simultaneously, the inadequate synchronization primitives fail to prevent race conditions. This can result in double-free conditions where memory is freed multiple times, corrupting the heap and causing system instability.
The improper locking may manifest as missing mutex locks, incorrect lock ordering, or insufficient scope of protected critical sections within the image processing pipeline.
Attack Vector
The attack vector is local, requiring the attacker to have already compromised the device with System-level privileges. From this elevated position, the attacker can:
- Trigger concurrent operations within the imgsys subsystem
- Exploit the race window created by improper locking
- Cause memory corruption through double-free or use-after-free conditions
- Force the device into a denial of service state
The vulnerability manifests in the locking mechanism protecting shared memory resources within the image processing subsystem. The improper synchronization allows concurrent access that can corrupt memory structures, leading to system instability. For complete technical details, refer to the MediaTek Security Bulletin February 2026.
Detection Methods for CVE-2026-20415
Indicators of Compromise
- Unexpected system crashes or reboots related to image processing operations
- Kernel panic logs referencing imgsys driver or memory corruption errors
- Anomalous system service behavior indicating privilege escalation attempts
- Double-free or use-after-free error signatures in kernel logs
Detection Strategies
- Monitor kernel logs for imgsys driver errors and memory corruption signatures
- Implement runtime integrity checking for critical system services
- Deploy endpoint detection solutions capable of identifying privilege escalation patterns
- Analyze system stability metrics for unusual crash patterns correlated with image processing
Monitoring Recommendations
- Enable enhanced logging for MediaTek driver components on affected devices
- Configure alerting for kernel panic events related to memory management
- Monitor for unauthorized System privilege acquisition attempts
- Implement SentinelOne Singularity Mobile for comprehensive Android threat detection
How to Mitigate CVE-2026-20415
Immediate Actions Required
- Apply the February 2026 security patch from MediaTek immediately (Patch ID: ALPS10363254)
- Ensure Android devices with MT6897 and MT6989 chipsets receive the latest firmware updates
- Restrict System-level access to authorized processes only
- Monitor device fleet for signs of exploitation attempts
Patch Information
MediaTek has released a security patch addressing this vulnerability. The patch is identified as ALPS10363254 with Issue ID MSV-5617. Organizations should obtain the patch through official channels and apply it following vendor guidelines. Detailed patch information is available in the MediaTek Security Bulletin February 2026.
Workarounds
- Implement strict access controls to prevent unauthorized System privilege escalation
- Limit exposure of affected devices until patches can be applied
- Consider disabling non-essential image processing features if operationally feasible
- Deploy additional monitoring on devices that cannot be immediately patched
# Verify Android security patch level
adb shell getprop ro.build.version.security_patch
# Expected: 2026-02-01 or later for patched devices
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
