CVE-2025-26440 Overview
CVE-2025-26440 is a permissions bypass vulnerability in the Android CameraService component. Multiple functions in CameraService.cpp fail to enforce proper permission checks, allowing an application to access the camera while running in the background. Exploitation requires local access and low privileges but no user interaction. Successful exploitation results in local privilege escalation without needing additional execution privileges. The flaw is classified under CWE-862: Missing Authorization and affects Android 14.
Critical Impact
A local application can access the device camera from the background without user awareness, bypassing Android's privacy and permission model.
Affected Products
- Google Android 14.0
- Devices running the Android platform frameworks (frameworks/av and frameworks/base)
- Android builds prior to the May 2025 security patch level
Discovery Timeline
- 2025-09-04 - CVE-2025-26440 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-26440
Vulnerability Analysis
The vulnerability resides in the Android CameraService implementation within frameworks/av. Multiple functions in CameraService.cpp do not consistently validate whether the calling application has the required permissions and foreground state to access camera hardware. Android normally enforces the android.permission.CAMERA runtime permission and restricts background camera access through the foreground service and process-state model. This vulnerability breaks that model because the affected code paths omit or incorrectly perform the authorization check.
An application that already holds low-level privileges on the device can invoke the affected CameraService interfaces from a background context. The service processes the request as if the caller were authorized, granting access to the camera stream. This produces a local escalation of privilege because the attacker gains a capability, background camera capture, that the platform's access control explicitly forbids.
The fix was distributed through changes to both platform/frameworks/av and platform/frameworks/base, indicating the authorization logic spans the native camera service and the Java framework layer.
Root Cause
The root cause is missing authorization ([CWE-862]) in CameraService.cpp. Specific entry points into the service do not verify the caller's permission grant and foreground state before returning a camera handle. The framework layer relied on the native service to enforce state-based restrictions, and the native service assumed the framework had already done so, producing a gap.
Attack Vector
Exploitation requires a locally installed application on the target device. The malicious app does not need special execution privileges beyond those a normal installed application receives. The app calls into CameraService from a background process and receives camera frames without triggering the standard privacy indicators. No user interaction is required after installation.
The vulnerability manifests entirely in the platform code paths. Refer to the Android Code Review and the Android Framework Patch for the specific code changes that add the missing checks.
Detection Methods for CVE-2025-26440
Indicators of Compromise
- Applications binding to camera interfaces while in a background process state without a corresponding foreground service notification.
- Unexpected CameraService client connections in logcat originating from processes that lack a visible activity or foreground service.
- Camera hardware activity (LED, sensor power) occurring when no user-facing camera application is running.
Detection Strategies
- Audit installed applications for use of camera APIs combined with background execution mechanisms such as JobScheduler, WorkManager, or broadcast receivers.
- Review Android security patch levels across the mobile fleet and flag devices below the 2025-05-01 patch level.
- Correlate device telemetry showing camera usage events with application foreground state changes.
Monitoring Recommendations
- Enable and centralize Android device logs, including logcat from CameraService, through a mobile device management (MDM) or endpoint telemetry solution.
- Monitor for anomalous permission usage patterns reported by Android 12+ Privacy Dashboard on managed devices.
- Track the Android security patch level attribute across enrolled devices and alert on devices that remain unpatched after vendor updates ship.
How to Mitigate CVE-2025-26440
Immediate Actions Required
- Apply the Android security patch level 2025-05-01 or later to all affected devices.
- For fleets managed through MDM, push OS updates to Android 14 devices and enforce a minimum patch level policy.
- Restrict installation of untrusted applications on devices that cannot be updated immediately.
Patch Information
Google addressed CVE-2025-26440 in the Android Security Bulletin May 2025. The fix adds the missing authorization checks in CameraService.cpp and the corresponding framework code. Device manufacturers integrate this patch into their monthly security update cycle. Confirm the device shows a security patch level of 2025-05-01 or later under Settings > About phone > Android version.
Workarounds
- Limit application installation to vetted sources such as Google Play and enterprise app catalogs until the patch is applied.
- Revoke the CAMERA permission for applications that do not require it through Settings or MDM policy.
- Use MDM policy to block installation of applications requesting the CAMERA permission on high-sensitivity devices pending patch deployment.
# Verify the Android security patch level on a connected device
adb shell getprop ro.build.version.security_patch
# Expected output for a patched device: 2025-05-01 or later
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
