CVE-2024-27437: Debian Linux

Medium severity, CVSS 5.5. EPSS: 0.2% chance of exploitation in the next 30 days.

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.

Affected products

• Debian Debian Linux: version 10.0 only
• Linux Linux Kernel: from 3.6, before 6.1.84 (fixed in 6.1.84); from 6.2, before 6.6.24 (fixed in 6.6.24); from 6.7, before 6.7.12 (fixed in 6.7.12); from 6.8, before 6.8.3 (fixed in 6.8.3); from 6.8.4, up to and including 6.8.12

Published 2024-04-05. Last modified 2026-06-17.