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CVE-2024-26814— vfio/fsl-mc: Block calling interrupt handler without trigger

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/fsl-mc中存在安全问题。

AI Predicted 6.9 Difficulty: Hard EPSS 0.22% · P12

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 16

VendorProduct Version RangeStatus
Linux Linux cc0ee20bd96971c10eba9a83ecf1c0733078a083< a563fc18583ca4f42e2fdd0c70c7c618288e7ede affected
cc0ee20bd96971c10eba9a83ecf1c0733078a083< 250219c6a556f8c69c5910fca05a59037e24147d affected
cc0ee20bd96971c10eba9a83ecf1c0733078a083< 083e750c9f5f4c3bf61161330fb84d7c8e8bb417 affected
cc0ee20bd96971c10eba9a83ecf1c0733078a083< ee0bd4ad780dfbb60355b99f25063357ab488267 affected
cc0ee20bd96971c10eba9a83ecf1c0733078a083< de87511fb0404d23b6da5f4660383b6ed095e28d affected
cc0ee20bd96971c10eba9a83ecf1c0733078a083< 6ec0d88166dac43f29e96801c0927d514f17add9 affected
cc0ee20bd96971c10eba9a83ecf1c0733078a083< 7447d911af699a15f8d050dfcb7c680a86f87012 affected
5.10 affected
… +8 more rows
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I. Basic Information for CVE-2024-26814

Vulnerability Information
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Vulnerability Title
vfio/fsl-mc: Block calling interrupt handler without trigger
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: vfio/fsl-mc: Block calling interrupt handler without trigger The eventfd_ctx trigger pointer of the vfio_fsl_mc_irq object is initially NULL and may become NULL if the user sets the trigger eventfd to -1. The interrupt handler itself is guaranteed that trigger is always valid between request_irq() and free_irq(), but the loopback testing mechanisms to invoke the handler function need to test the trigger. The triggering and setting ioctl paths both make use of igate and are therefore mutually exclusive. The vfio-fsl-mc driver does not make use of irqfds, nor does it support any sort of masking operations, therefore unlike vfio-pci and vfio-platform, the flow can remain essentially unchanged.
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/fsl-mc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 cc0ee20bd96971c10eba9a83ecf1c0733078a083 ~ a563fc18583ca4f42e2fdd0c70c7c618288e7ede -
Linux Linux 5.10 -

II. Public POCs for CVE-2024-26814

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III. Intelligence Information for CVE-2024-26814

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Patches & Fixes for CVE-2024-26814 (1)

Mailing List Discussions for CVE-2024-26814 (1)

Other References for CVE-2024-26814 (6)

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-2024-27437 vfio/pci: Disable auto-enable of exclusive INTx IRQ
CVE-2024-26813 vfio/platform: Create persistent IRQ handlers

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-26814

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