CVE-2024-27437

In the Linux kernel, the following vulnerability has been resolved: vfio/pci: Disable auto-enable of exclusive INTx IRQ Currently for devices requiring masking at the irqchip for INTx, ie. devices without DisINTx support, the IRQ is enabled in request_irq() and subsequently disabled as necessary to align with the masked status flag. This presents a window where the interrupt could fire between these events, resulting in the IRQ incrementing the disable depth twice. This would be unrecoverable for a user since the masked flag prevents nested enables through vfio. Instead, invert the logic using IRQF_NO_AUTOEN such that exclusive INTx is never auto-enabled, then unmask as required.

CVSS 3.1

5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS

0.2% chance of exploitation in the next 30 days; higher than 14% of CVEs (scores of 2026-10-25)

Published

2024-04-05

Modified

2026-10-15

Record from

the NVD, synced 2026-10-19

Affected

• debian:debian_linux
• linux:linux_kernel

References

• https://git.kernel.org/stable/c/139dfcc4d723ab13469881200c7d80f49d776060
• https://git.kernel.org/stable/c/26389925d6c2126fb777821a0a983adca7ee6351
• https://git.kernel.org/stable/c/2a4a666c45107206605b7b5bc20545f8aabc4fa2
• https://git.kernel.org/stable/c/3b3491ad0f80d913e7d255941d4470f4a4d9bfda
• https://git.kernel.org/stable/c/561d5e1998d58b54ce2bbbb3e843b669aa0b3db5

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