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Resource Injection The advisory has been revoked - it doesn't affect any version of package kernel-64k-modules-internal  (opens in a new tab)

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EPSS
0.08% (25th percentile)

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  • Snyk IDSNYK-RHEL9-KERNEL64KMODULESINTERNAL-6578192
  • published6 Apr 2024
  • disclosed5 Apr 2024
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Introduced: 5 Apr 2024

CVE-2024-27437  (opens in a new tab)
CWE-99  (opens in a new tab)

Amendment

The Red Hat security team deemed this advisory irrelevant for RHEL:9.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-64k-modules-internal package and not the kernel-64k-modules-internal package as distributed by RHEL.

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.