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CVE-2024-27437— vfio/pci: Disable auto-enable of exclusive INTx IRQ

EPSS 0.01% · P2
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I. Basic Information for CVE-2024-27437

Vulnerability Information
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Vulnerability Title
vfio/pci: Disable auto-enable of exclusive INTx IRQ
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于 vfio/pci 中存在安全问题。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
LinuxLinux 89e1f7d4c66d85f42c3d52ea3866eb10cadf6153 ~ 26389925d6c2126fb777821a0a983adca7ee6351 -
LinuxLinux 3.6 -

II. Public POCs for CVE-2024-27437

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III. Intelligence Information for CVE-2024-27437

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Same Patch Batch · Linux · 2024-04-05 · 5 CVEs total

CVE-2024-26814vfio/fsl-mc: Block calling interrupt handler without trigger
CVE-2024-26812vfio/pci: Create persistent INTx handler
CVE-2024-26813vfio/platform: Create persistent IRQ handlers
CVE-2024-26810vfio/pci: Lock external INTx masking ops

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-27437

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