CVE-2025-9614 in PCI Express Integrity and Data Encryption Specification
Summary
by MITRE • 12/09/2025
An issue was discovered in the PCI Express (PCIe) Integrity and Data Encryption (IDE) specification, where insufficient guidance on re-keying and stream flushing during device rebinding may allow stale write transactions from a previous security context to be processed in a new one. This can lead to unintended data access across trusted domains, compromising confidentiality and integrity.
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Analysis
by VulDB Data Team • 12/11/2025
The vulnerability described in CVE-2025-9614 represents a critical flaw in the PCI Express Integrity and Data Encryption (IDE) specification that fundamentally undermines the security boundaries between different operational contexts within PCIe devices. This issue specifically targets the re-keying and stream flushing mechanisms that are essential for maintaining cryptographic integrity when devices undergo rebinding operations. The flaw exists in how the specification addresses the transition between security contexts, creating a window of opportunity where legacy cryptographic states can persist and potentially influence new operational environments. The PCI Express IDE specification is designed to provide data integrity and confidentiality protection for PCIe transactions, making this vulnerability particularly concerning for systems that rely on these security mechanisms to isolate sensitive operations and prevent unauthorized data access across different trust domains.
The technical implementation of this vulnerability stems from inadequate specification of the re-keying process and stream flushing procedures during device rebinding scenarios. When a PCIe device transitions from one security context to another, the system should ensure that all pending write transactions from the previous context are properly flushed and that cryptographic keys are correctly updated to prevent cross-contamination. However, the current specification fails to provide sufficient guidance on handling these critical transitions, allowing stale write transactions to remain in processing queues or buffers. This creates a scenario where data that was encrypted under one key and context could be inadvertently processed under a different cryptographic context, potentially exposing sensitive information or enabling malicious actors to manipulate data flows between previously isolated security domains. The vulnerability manifests as a failure to properly enforce cryptographic boundaries during context switches, which directly violates the fundamental principles of secure data handling in hardware security mechanisms.
The operational impact of CVE-2025-9614 extends across multiple security domains and operational environments where PCIe devices with IDE capabilities are deployed. Systems utilizing PCIe IDE for protecting sensitive data transfers, such as storage controllers, network interface cards, and graphics processing units, become vulnerable to data leakage and integrity compromise when devices undergo rebinding operations. The vulnerability is particularly dangerous in multi-tenant environments, cloud infrastructure, and systems with dynamic device allocation where context switching occurs frequently. Attackers could potentially exploit this flaw to gain unauthorized access to data that should be isolated within different security contexts, effectively breaking the confidentiality and integrity guarantees that the PCIe IDE specification is designed to provide. This vulnerability also impacts systems where devices are frequently reprogrammed or reconfigured, as each rebind operation creates an opportunity for stale data transactions to influence new operational contexts. The implications are severe enough to potentially compromise entire system security architectures that rely on PCIe IDE for protecting critical data flows.
Mitigation strategies for CVE-2025-9614 must address both the immediate specification gaps and implement robust operational controls to prevent exploitation. Organizations should prioritize updating firmware and drivers to implementations that properly handle re-keying and stream flushing during device rebinding, ensuring that cryptographic contexts are completely isolated during transitions. The implementation should enforce strict transaction flushing mechanisms that prevent any pending write operations from the previous context from being processed in the new context. Security architects should implement additional monitoring and logging of device rebinding operations to detect anomalous behavior that might indicate exploitation attempts. This vulnerability aligns with CWE-310 (Cryptographic Issues) and represents a specific implementation weakness in cryptographic context management. From an ATT&CK framework perspective, this vulnerability maps to techniques involving privilege escalation and credential access through hardware security flaws, potentially enabling adversaries to move laterally across security domains. Organizations should also consider implementing device-level security policies that minimize the frequency of rebinding operations where possible and ensure that all security context transitions are properly validated and enforced through hardware-level mechanisms rather than relying solely on software implementations.