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CVE-2022-48894

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: iommu/arm-smmu-v3: Don't unregister on shutdown Similar to SMMUv2, this driver calls iommu_device_unregister() from the shutdow…

Published Aug 21, 2024CWE-476EPSS 0.21%

Overview

CVE-2022-48894 is a medium-severity vulnerability. It was published on August 21, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

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

iommu/arm-smmu-v3: Don't unregister on shutdown

Similar to SMMUv2, this driver calls iommu_device_unregister() from the

shutdown path, which removes the IOMMU groups with no coordination

whatsoever with their users - shutdown methods are optional in device

drivers. This can lead to NULL pointer dereferences in those drivers'

DMA API calls, or worse.

Instead of calling the full arm_smmu_device_remove() from

arm_smmu_device_shutdown(), let's pick only the relevant function call -

arm_smmu_device_disable() - more or less the reverse of

arm_smmu_device_reset() - and call just that from the shutdown path.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/32ea2c57dc216b6ad8125fa680d31daa5d421c95Refgit.kernel.org/stable/c/ead3e6c79479890444c777fd329afc125fecde48

How CyberStrike helps

Frequently asked questions

What is CVE-2022-48894?

CVE-2022-48894 is a medium-severity vulnerability. It was published on August 21, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2022-48894?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2022-48894?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2022-48894?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2022-48894 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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