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

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.24% · P14

Possible ATT&CK Techniques 1 AI

T1055 · Process Injection

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 89e1f7d4c66d85f42c3d52ea3866eb10cadf6153< 26389925d6c2126fb777821a0a983adca7ee6351 affected
89e1f7d4c66d85f42c3d52ea3866eb10cadf6153< 561d5e1998d58b54ce2bbbb3e843b669aa0b3db5 affected
89e1f7d4c66d85f42c3d52ea3866eb10cadf6153< b7a2f0955ffceffadfe098b40b50307431f45438 affected
89e1f7d4c66d85f42c3d52ea3866eb10cadf6153< 139dfcc4d723ab13469881200c7d80f49d776060 affected
89e1f7d4c66d85f42c3d52ea3866eb10cadf6153< 2a4a666c45107206605b7b5bc20545f8aabc4fa2 affected
89e1f7d4c66d85f42c3d52ea3866eb10cadf6153< 3b3491ad0f80d913e7d255941d4470f4a4d9bfda affected
89e1f7d4c66d85f42c3d52ea3866eb10cadf6153< bf0bc84a20e6109ab07d5dc072067bd01eb931ec affected
89e1f7d4c66d85f42c3d52ea3866eb10cadf6153< fe9a7082684eb059b925c535682e68c34d487d43 affected
… +10 more rows
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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: CVE Program / CVE List V5
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: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
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

Vendor Product Affected Versions CPE Subscribe
Linux Linux 89e1f7d4c66d85f42c3d52ea3866eb10cadf6153 ~ 26389925d6c2126fb777821a0a983adca7ee6351 -
Linux Linux 3.6 -

II. Public POCs for CVE-2024-27437

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III. Intelligence Information for CVE-2024-27437

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Mailing List Discussions for CVE-2024-27437 (1)

Other References for CVE-2024-27437 (8)

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

CVE-2024-26812 7.8 HIGH vfio/pci: Create persistent INTx handler
CVE-2024-26810 7.8 HIGH vfio/pci: Lock external INTx masking ops
CVE-2024-26814 vfio/fsl-mc: Block calling interrupt handler without trigger
CVE-2024-26813 vfio/platform: Create persistent IRQ handlers

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-27437

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