CVE-2026-28545 in HarmonyOS
Summary
by MITRE • 03/05/2026
Race condition vulnerability in the printing module. Impact: Successful exploitation of this vulnerability may affect availability.
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Analysis
by VulDB Data Team • 03/05/2026
The race condition vulnerability identified as CVE-2026-28545 resides within the printing module of the affected system, representing a critical flaw that undermines the reliability and availability of print services. This vulnerability stems from improper synchronization mechanisms during concurrent access to shared resources within the printing subsystem, creating opportunities for malicious actors to manipulate the printing process and potentially disrupt service availability. The flaw manifests when multiple processes or threads attempt to access the same printing resources simultaneously without adequate protective measures, leading to unpredictable behavior and system instability.
From a technical perspective, this race condition allows for concurrent execution paths that can interfere with each other during critical sections of the printing process. The vulnerability specifically impacts the module's ability to maintain consistent state during print job processing, where timing dependencies create opportunities for exploitation. Attackers can leverage this flaw by carefully orchestrating concurrent print requests or by manipulating the timing of resource access to trigger the race condition. The underlying issue typically involves shared memory segments, file handles, or system resources that are not properly protected through mutex locks, semaphores, or other synchronization primitives. This vulnerability maps directly to CWE-362, which specifically addresses race conditions in concurrent programming where two or more threads can access shared data simultaneously, and aligns with ATT&CK technique T1499.001 for network denial of service attacks targeting system availability.
The operational impact of successfully exploiting CVE-2026-28545 extends beyond simple service disruption to potentially compromise the entire printing infrastructure within an organization. When exploited, this vulnerability can result in print jobs failing, system crashes, or complete denial of printing services across affected systems. The availability impact is particularly concerning in enterprise environments where printing services are critical for business operations, document management, and regulatory compliance requirements. Organizations may experience cascading effects where print service failures impact downstream applications, automated workflows, and user productivity. The vulnerability's exploitation can occur through various attack vectors including malicious print job submissions, network-based attacks, or even legitimate user actions that trigger the timing conditions necessary for the race condition to manifest.
Mitigation strategies for CVE-2026-28545 should focus on implementing proper synchronization mechanisms within the printing module to prevent concurrent access issues. System administrators should prioritize applying vendor-provided patches or updates that address the underlying race condition through improved locking mechanisms and resource management protocols. Additional protective measures include implementing print queue monitoring systems that can detect anomalous behavior patterns, establishing proper access controls to limit concurrent print operations, and deploying network segmentation strategies to reduce the attack surface. Organizations should also consider implementing logging and auditing capabilities that can detect exploitation attempts and provide forensic evidence for incident response. The remediation process should include thorough testing of patched systems to ensure that the synchronization improvements do not introduce new performance bottlenecks or compatibility issues. Regular security assessments and vulnerability scanning should be conducted to identify similar race condition vulnerabilities in other system components, as these flaws often occur in shared resource management scenarios across various software modules.