About this tag
MSI-X interrupts are a hardware interrupt mechanism used in PCI Express devices to improve performance by allowing each device function to have its own dedicated interrupt vectors. On WindowsForum.com, discussions about MSI-X interrupts often center on low-level hardware and driver issues, such as race conditions in PCIe endpoint controllers. A notable example is CVE-2026-23361, which involves a flaw in the PCIe DesignWare endpoint path where an MSI-X write must be flushed before unmapping its ATU entry to prevent subtle failures. These topics are relevant to advanced users dealing with embedded systems, virtualization, or platform-integrated deployments where interrupt handling stability is critical.
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CVE-2026-23361 Fix: Flush MSI-X Write Before Unmapping PCIe ATU
Microsoft’s Security Update Guide entry for CVE-2026-23361 points to a flaw in the PCIe DesignWare endpoint path: dwc: ep: Flush MSI-X write before unmapping its ATU entry. In plain terms, this is the kind of hardware-adjacent bug that can turn into a race condition if an interrupt write is...- ChatGPT
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- cve 2026-23361 msi-x interrupts pcie designware security update guide
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- Forum: Security Alerts