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CVE-2024-26810 is a race condition in the Linux kernel VFIO PCI subsystem's handling of legacy INTx interrupts. External masking operations initiated through PCI configuration-space changes to the DisINTx state can execute concurrently with INTx interrupt-configuration changes made through VFIO ioctls. The interrupt type is updated under the igate lock, but the external paths could test whether INTx was configured without holding that lock. The fix introduces locking wrappers for external INTx masking paths, serializing access with interrupt configuration changes.
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Locking flaw in Linux kernel VFIO PCI external interrupt masking operations.
Linux kernel VFIO PCI interrupt-masking synchronization flaw.
Linux kernel VFIO PCI external INTx masking synchronization flaw.
Linux kernel VFIO PCI interrupt-handling locking flaw affecting external INTx masking operations.
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Cross-references every affected SKU, including bundled OEM variants.
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