CVE-2026-57546 in Snapdragon MC
Summary
by MITRE • 10/06/2026
Transient DOS when processing a continuous receive command with a zero-sized global configuration override.
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Analysis
by VulDB Data Team • 10/06/2026
The vulnerability described involves a transient Denial of Service condition triggered by the specific interaction between a continuous receive command and a zero-sized global configuration override within the affected software system. This scenario highlights a critical flaw in how the application handles resource allocation and state management when processing input parameters that deviate from expected norms, specifically regarding size constraints defined at the global level. The core technical issue stems from an improper validation or handling mechanism where the system fails to adequately account for edge cases involving zero-length configurations during persistent data ingestion operations. When a continuous receive command is executed alongside such an override, the internal logic likely enters an unexpected state that consumes excessive resources or causes a temporary halt in processing capabilities, leading to service unavailability for legitimate users.
From a technical perspective, this flaw aligns with CWE-400, which categorizes issues related to Uncontrolled Resource Consumption. The transient nature of the Denial of Service suggests that while the system may eventually recover without requiring a full restart, it experiences significant latency or processing blocks during the attack window. This behavior is often indicative of inefficient loop handling, memory allocation errors, or thread blocking mechanisms within the application's core architecture. The zero-sized override likely acts as an anomalous trigger that disrupts normal parsing routines, causing the system to either spin in a tight loop waiting for data that will never arrive under those specific constraints or allocate resources in a way that exhausts available buffers and processing threads temporarily.
The operational impact of this vulnerability is primarily centered on service reliability and availability rather than data integrity or confidentiality. Attackers can exploit this condition by repeatedly sending continuous receive commands paired with the zero-sized global configuration override, effectively creating a low-bandwidth but high-frequency attack vector. This approach allows for sustained disruption without requiring massive payloads, making it difficult to detect through traditional volume-based intrusion detection systems that look for large data spikes. The transient aspect means that while services may resume normal operation after some time, repeated exploitation can lead to cumulative degradation of system performance or eventual crash if the underlying resource exhaustion is not managed properly by operating-level safeguards like timeouts or rate limiting.
In terms of threat modeling and industry standards, this vulnerability maps closely to MITRE ATT&CK technique T1499, Endpoint Denial of Service, specifically under sub-techniques involving application layer attacks that exploit logic flaws rather than resource exhaustion through sheer volume. The exploitation requires the attacker to have some level of access or ability to send specific commands with modified configuration parameters, suggesting it may be classified as an insider threat vector or a result of insufficient authentication controls if external actors can trigger these conditions remotely. Understanding this context is crucial for prioritizing remediation efforts based on the likelihood of remote exploitability versus internal misuse scenarios.
Mitigation strategies should focus on both immediate patching and architectural improvements to prevent recurrence. The primary solution involves applying vendor-provided patches that address the specific logic error in handling zero-sized global configuration overrides during continuous receive operations. Beyond software updates, defensive measures include implementing strict input validation at the application boundary to reject or sanitize requests containing invalid size parameters before they reach critical processing modules. Additionally, deploying rate limiting and request throttling mechanisms can mitigate the impact by preventing rapid successive executions of such commands. Monitoring tools should be configured to detect anomalous patterns in configuration changes combined with high-frequency receive operations, enabling early detection and automated response actions that isolate affected components or reset their state before significant service degradation occurs.