CVE-2026-15792 in BuildKit
Summary
by MITRE • 07/21/2026
A malicious BuildKit client or frontend could craft a request that could lead to BuildKit daemon crashing with a panic.
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Analysis
by VulDB Data Team • 07/21/2026
This vulnerability represents a critical denial of service condition within the BuildKit container build system where adversarial input can trigger daemon crashes through panic exceptions. The flaw exists in the request processing logic of the BuildKit daemon which fails to properly validate or sanitize incoming requests from clients or frontends. When a malicious actor crafts specifically formatted requests, the daemon encounters unexpected conditions that cause it to terminate abruptly rather than gracefully handling the malformed input. This represents a classic input validation failure that can be exploited across various attack vectors including remote code execution scenarios where attackers might attempt to disrupt container build processes. The vulnerability demonstrates poor error handling practices and insufficient request sanitization mechanisms within the BuildKit architecture, allowing adversarial inputs to bypass normal operational boundaries and cause system instability.
The technical implementation of this vulnerability stems from inadequate boundary checking and exception handling within the daemon's request processing pipeline. When a client or frontend submits a malformed request containing unexpected data structures or values that the daemon cannot properly interpret, the system fails to implement proper error recovery mechanisms. Instead of gracefully logging the malformed input and continuing operations, the daemon experiences a panic condition that results in immediate termination. This behavior aligns with common software engineering pitfalls where developers assume all inputs will conform to expected formats without implementing adequate defensive programming practices. The vulnerability can be classified under CWE-248 as an unchecked exception or error condition leading to system instability and availability disruption.
Operational impact of this vulnerability extends beyond simple service disruption to potential compromise of container build environments and development workflows. When the BuildKit daemon crashes, it affects all ongoing container builds that depend on that daemon instance, potentially causing significant delays in software deployment cycles and breaking automated CI/CD pipelines. Attackers could exploit this weakness systematically to cause repeated daemon failures, leading to persistent service unavailability that impacts development teams and production environments. The crash behavior creates a window of opportunity for additional attacks as the system restarts and reinitializes, potentially exposing transient states or race conditions during recovery. This vulnerability particularly affects organizations relying heavily on containerized build processes where availability of the BuildKit daemon is critical to maintaining operational continuity.
Mitigation strategies should focus on implementing comprehensive input validation and defensive programming practices within the BuildKit daemon implementation. Organizations should deploy request sanitization layers that filter and normalize all incoming requests before they reach core processing logic, ensuring malformed inputs are handled gracefully rather than causing system panics. Regular updates to BuildKit components and implementation of automated monitoring for daemon stability can help detect exploitation attempts. The solution architecture should incorporate proper error handling mechanisms that log problematic requests without terminating the daemon process, along with circuit breaker patterns that prevent cascading failures during sustained attack conditions. Security hardening measures including restricted access controls for BuildKit endpoints and network segmentation can limit exposure to potential attackers while implementing robust logging and alerting systems to detect abnormal daemon behavior patterns. This vulnerability underscores the importance of applying ATT&CK framework concepts related to privilege escalation and denial of service, where maintaining system stability and availability forms a fundamental security control that must be integrated into all software development lifecycle processes.