CVE-2026-49315 Overview
CVE-2026-49315 is a denial-of-service (DoS) vulnerability in the input device module disclosed through Huawei's monthly consumer security bulletin. Successful exploitation affects availability of the impacted device. The flaw is exploitable locally without authentication or user interaction and can impact resources beyond the vulnerable component's security scope. The weakness is classified under [CWE-264] (Permissions, Privileges, and Access Controls).
Critical Impact
A local attacker can trigger a denial-of-service condition in the input device module, disrupting device availability without requiring credentials or user interaction.
Affected Products
- Huawei consumer devices referenced in the September 2026 support bulletin
- Huawei Vision products referenced in the September 2026 Vision support bulletin
- Specific model and version list: refer to vendor advisories
Discovery Timeline
- 2026-09-09 - CVE-2026-49315 published to the National Vulnerability Database (NVD)
- 2026-09-09 - Last updated in the NVD database
Technical Details for CVE-2026-49315
Vulnerability Analysis
The vulnerability resides in the input device module of the affected Huawei platform. According to the vendor advisory, successful exploitation impacts availability. The CVSS vector indicates the issue is reachable from a local context, requires no privileges, and requires no user interaction. The scope is marked as changed, meaning the impact can extend beyond the vulnerable component to other parts of the system.
Only availability is affected. Confidentiality and integrity remain intact, which is consistent with a resource-exhaustion or crash-inducing condition rather than data exposure or code execution.
Root Cause
Huawei has not published low-level technical details. The [CWE-264] classification points to improper permissions, privileges, or access control checks within the input device module. The scope change suggests the module's failure propagates to a broader trust boundary, such as a subsystem or higher-privileged process that depends on the input device.
Attack Vector
An attacker with local access to the device sends crafted input or interacts with the input device module in an unexpected way. The module fails to handle the condition safely and enters a DoS state, degrading or halting availability of dependent services. No authentication or user interaction is required to trigger the condition.
No public proof-of-concept code has been released. Technical detail is limited to the vendor's Huawei Support Bulletin 2026/9 and the Huawei Support Bulletin Vision 2026/9.
Detection Methods for CVE-2026-49315
Indicators of Compromise
- Unexpected crashes, reboots, or hangs of the input device subsystem or dependent user-interface services
- Repeated kernel or system log entries referencing input device driver faults
- Loss of touch, key, or sensor input followed by service restart events
Detection Strategies
- Monitor device system logs for recurring faults in the input device module and correlate with local process activity
- Track abnormal application behavior that interacts with input APIs at high frequency or with malformed parameters
- Baseline normal input subsystem stability and alert on deviations across a fleet of managed devices
Monitoring Recommendations
- Enroll affected Huawei consumer and Vision devices into a mobile device management (MDM) platform to collect crash telemetry
- Aggregate device health and crash logs in a centralized data lake for cross-device correlation
- Alert on repeated availability loss events on the same device within a short window
How to Mitigate CVE-2026-49315
Immediate Actions Required
- Apply the security update referenced in the September 2026 Huawei support bulletin for both consumer and Vision product lines
- Inventory Huawei devices in the environment and prioritize patching for models listed in the vendor advisory
- Restrict installation of untrusted third-party applications that can interact with the input device module
Patch Information
Huawei addresses this vulnerability in the September 2026 security update. Refer to the Huawei Support Bulletin 2026/9 for consumer devices and the Huawei Support Bulletin Vision 2026/9 for Vision products to identify the specific firmware or EMUI build that contains the fix for the affected model.
Workarounds
- No vendor-supplied workaround is documented; patching is the recommended remediation
- Limit physical and local access to affected devices until updates are installed
- Remove or disable applications that are not required and that request access to input-related APIs
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
