CVE-2026-58817 in Android
Summary
by MITRE • 11/02/2026
In parseKnownActivityEmbeddingCerts of ParsingUtils.java, there is a possible permanent denial of service due to improper input validation. This could lead to local denial of service with no additional execution privileges needed. User interaction is not needed for exploitation.
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Analysis
by VulDB Data Team • 11/02/2026
The vulnerability identified in the parseKnownActivityEmbeddingCerts method within ParsingUtils.java represents a critical flaw rooted in insufficient input validation, which directly facilitates a permanent denial of service condition. This specific implementation error occurs when the application processes certificate data associated with known activities without adequately verifying the structure, length, or integrity of the incoming inputs before attempting to parse them. The lack of robust boundary checks and type verification allows malformed or excessively large payloads to bypass initial filtering mechanisms, leading to unhandled exceptions or infinite loops within the parsing logic that effectively crash the application process. Because this function is likely invoked during standard system operations involving activity embedding certificates, the vulnerability can be triggered without requiring any specific user interaction, making it a passive vector for exploitation where an attacker merely needs to influence the data stream processed by the service.
From a technical perspective, this flaw aligns with CWE-20 Improper Input Validation and potentially CWE-400 Uncontrolled Resource Consumption if the parsing logic enters a state of resource exhaustion such as memory leaks or CPU spikes before crashing. The permanent nature of the denial of service suggests that the crash may not be recoverable through simple restart mechanisms, possibly due to corrupted internal states or locked resources that require manual intervention or system reboot to restore functionality. This persistence distinguishes it from transient crashes and elevates its severity significantly within the context of application stability and availability requirements. The absence of a need for additional execution privileges means that any process with access to the input channel can trigger this condition, lowering the barrier to entry for potential attackers who might seek to disrupt service continuity or cause system instability through resource exhaustion attacks.
The operational impact of this vulnerability is severe, particularly in environments where high availability and continuous operation are paramount. A local denial of service resulting from improper validation means that any component with write access to the relevant input streams can destabilize the entire application stack dependent on ParsingUtils.java. This could lead to significant downtime, loss of data integrity if transactions were interrupted mid-processing, and increased operational costs due to the need for frequent restarts or manual recovery procedures. In mobile operating systems or embedded environments where such parsing utilities are common, this flaw could affect core system services, leading to broader device instability that impacts multiple applications rather than just a single isolated process.
Mitigation strategies must focus on implementing rigorous input validation and sanitization protocols within the parseKnownActivityEmbeddingCerts method. Developers should enforce strict schema validation for certificate structures, ensuring that all fields meet expected length constraints and format requirements before processing begins. Implementing timeout mechanisms and resource limits can also help prevent infinite loops or excessive memory consumption during parsing operations. Additionally, incorporating comprehensive error handling with graceful degradation ensures that malformed inputs result in controlled failures rather than catastrophic crashes. Regular security audits and static code analysis tools should be employed to detect similar patterns of improper input validation across the codebase, aligning remediation efforts with industry standards such as OWASP guidelines for secure coding practices.