CVE-2026-28546 in HarmonyOS
Summary
by MITRE • 03/05/2026
Buffer overflow vulnerability in the scanning module. Impact: Successful exploitation of this vulnerability may affect availability.
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Analysis
by VulDB Data Team • 03/05/2026
The buffer overflow vulnerability identified as CVE-2026-28546 resides within the scanning module of the affected system, representing a critical security flaw that can compromise system availability. This vulnerability manifests when the scanning module processes input data without proper bounds checking, allowing an attacker to overwrite adjacent memory locations in the program's memory space. The flaw specifically affects the module's ability to handle oversized input data during scan operations, creating an exploitable condition that can be leveraged to disrupt normal system operations. According to CWE-121, this vulnerability falls under the category of stack-based buffer overflow, where insufficient bounds checking enables attackers to write beyond allocated memory boundaries. The scanning module's failure to validate input lengths before processing creates a pathway for malicious actors to inject crafted data that exceeds the allocated buffer size, potentially leading to memory corruption and system instability.
The operational impact of this vulnerability extends beyond simple denial of service conditions, as successful exploitation can result in complete system compromise and availability disruption. When an attacker successfully triggers the buffer overflow, they can manipulate the program execution flow by overwriting return addresses or function pointers stored in memory. This memory corruption can lead to arbitrary code execution, allowing threat actors to gain unauthorized access to the system or cause system crashes that prevent legitimate users from accessing services. The vulnerability's impact on availability is particularly concerning as it can be exploited through remote network connections, enabling attackers to perform distributed denial of service attacks against targeted systems. The flaw's location within the scanning module suggests that it may be triggered during routine system operations such as network scanning, file system analysis, or security audit processes, making exploitation both frequent and potentially devastating to system operations.
Mitigation strategies for CVE-2026-28546 must address both immediate remediation and long-term security hardening measures. The primary solution involves implementing proper input validation and bounds checking within the scanning module to prevent oversized data from being processed without adequate safeguards. Security patches should include memory protection mechanisms such as stack canaries, address space layout randomization, and data execution prevention features to make exploitation more difficult. Organizations should also implement network segmentation and access controls to limit exposure of vulnerable systems to potential attackers. According to ATT&CK framework technique T1499, this vulnerability represents a potential pathway for availability attacks that can be mitigated through proper system hardening and monitoring. Regular security assessments should be conducted to identify similar buffer overflow vulnerabilities within other system components, as the scanning module may not be the only vulnerable component. System administrators should also establish monitoring protocols to detect anomalous scanning behaviors that could indicate exploitation attempts, while maintaining up-to-date intrusion detection systems to identify potential attack signatures associated with buffer overflow exploitation techniques.