CVE-2024-27437

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

05/04/2024

Last modified:

27/03/2025

Description

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.

Impact

Vector 3.x

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 5.50 MEDIUM
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x

5.50

Severity 3.x

MEDIUM

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:o:linux:linux_kernel::::::::	3.6 (including)	6.1.84 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.2 (including)	6.6.24 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.7 (including)	6.7.12 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.8 (including)	6.8.3 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.8.4 (including)	6.8.12 (including)
cpe:2.3:o:debian:debian_linux:10.0:::::::*

To consult the complete list of CPE names with products and versions, see this page

CVE-2024-27437

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools