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CVE-2024-40945

Disclosure Date: July 12, 2024 •
CVE-2024-40945
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Description

In the Linux kernel, the following vulnerability has been resolved:

iommu: Return right value in iommu_sva_bind_device()

iommu_sva_bind_device() should return either a sva bond handle or an
ERR_PTR value in error cases. Existing drivers (idxd and uacce) only
check the return value with IS_ERR(). This could potentially lead to
a kernel NULL pointer dereference issue if the function returns NULL
instead of an error pointer.

In reality, this doesn’t cause any problems because iommu_sva_bind_device()
only returns NULL when the kernel is not configured with CONFIG_IOMMU_SVA.
In this case, iommu_dev_enable_feature(dev, IOMMU_DEV_FEAT_SVA) will
return an error, and the device drivers won’t call iommu_sva_bind_device()
at all.

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CVSS V3 Severity and Metrics
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Impact Score:
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General Information

Offensive Application
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Utility Class
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Ports
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OS
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Vulnerable Versions
Linux 700f56475888
Linux not down converted
Prerequisites
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Discovered By
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Metasploit Module
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Vendors

  • Linux

Products

  • Linux
Technical Analysis