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CVE-2021-47064

5.3 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: mt76: fix potential DMA mapping leak With buf uninitialized in mt76_dma_tx_queue_skb_raw, its field skip_unmap could potentiall…

Published Feb 29, 2024CWE-401EPSS 0.77%

Overview

CVE-2021-47064 is a medium-severity vulnerability. It was published on February 29, 2024 and has a CVSS 3.1 base score of 5.3 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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

mt76: fix potential DMA mapping leak

With buf uninitialized in mt76_dma_tx_queue_skb_raw, its field skip_unmap

could potentially inherit a non-zero value from stack garbage.

If this happens, it will cause DMA mappings for MCU command frames to not be

unmapped after completion

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/91b9548d413fda488ea853cd1b9f59b572db3a0cRefgit.kernel.org/stable/c/9b68ce2856dadc0e1cb6fd21fbeb850da49efd08Refgit.kernel.org/stable/c/9fa26701cd1fc4d932d431971efc5746325bdfceRefgit.kernel.org/stable/c/b4403cee6400c5f679e9c4a82b91d61aa961eccfRefgit.kernel.org/stable/c/91b9548d413fda488ea853cd1b9f59b572db3a0cRefgit.kernel.org/stable/c/9b68ce2856dadc0e1cb6fd21fbeb850da49efd08Refgit.kernel.org/stable/c/9fa26701cd1fc4d932d431971efc5746325bdfceRefgit.kernel.org/stable/c/b4403cee6400c5f679e9c4a82b91d61aa961eccf

How CyberStrike helps

Frequently asked questions

What is CVE-2021-47064?

CVE-2021-47064 is a medium-severity vulnerability. It was published on February 29, 2024 and has a CVSS 3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2021-47064?

This vulnerability has a CVSS 3.1 base score of 5.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2021-47064?

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-2021-47064?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-47064 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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