What is the severity of CVE-2021-47064?

CVE-2021-47064 is classified as a medium-severity vulnerability in the Linux kernel.

What versions of the Linux kernel are affected by CVE-2021-47064?

CVE-2021-47064 affects Linux kernel versions between 5.10 and 5.10.37, 5.11 and 5.11.21, as well as 5.12 and 5.12.4.

How do I fix CVE-2021-47064?

To fix CVE-2021-47064, update the Linux kernel to a version that is not affected, specifically above the impacted versions.

What causes CVE-2021-47064?

CVE-2021-47064 is caused by an uninitialized buffer in the mt76_dma_tx_queue_skb_raw function, potentially leading to DMA mapping leaks.

Is there a workaround for CVE-2021-47064?

There are no specific workarounds for CVE-2021-47064; updating the kernel is the recommended approach.

Vulnerability/
CVE-2021-47064

medium

5.3

CWE

401

29/2/2024

8/4/2025

CVE-2021-47064: mt76: fix potential DMA mapping leak

First published: Thu Feb 29 2024(Updated: )

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

Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Affected Software	Affected Version	How to fix
Linux Kernel	>=5.10<5.10.37
Linux Kernel	>=5.11<5.11.21
Linux Kernel	>=5.12<5.12.4

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Reference Links

Frequently Asked Questions

What is the severity of CVE-2021-47064?
CVE-2021-47064 is classified as a medium-severity vulnerability in the Linux kernel.
What versions of the Linux kernel are affected by CVE-2021-47064?
CVE-2021-47064 affects Linux kernel versions between 5.10 and 5.10.37, 5.11 and 5.11.21, as well as 5.12 and 5.12.4.
How do I fix CVE-2021-47064?
To fix CVE-2021-47064, update the Linux kernel to a version that is not affected, specifically above the impacted versions.
What causes CVE-2021-47064?
CVE-2021-47064 is caused by an uninitialized buffer in the mt76_dma_tx_queue_skb_raw function, potentially leading to DMA mapping leaks.
Is there a workaround for CVE-2021-47064?
There are no specific workarounds for CVE-2021-47064; updating the kernel is the recommended approach.

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source/MITRE
agent/source
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agent/last-modified-date
agent/remedy
agent/softwarecombine
agent/tags
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collector/nvd-api
source/NVD
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vendor/linux
canonical/linux kernel
version/linux kernel/5.10
version/linux kernel/5.11
version/linux kernel/5.12

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Frequently Asked Questions

What is the severity of CVE-2021-47064?
CVE-2021-47064 is classified as a medium-severity vulnerability in the Linux kernel.
What versions of the Linux kernel are affected by CVE-2021-47064?
CVE-2021-47064 affects Linux kernel versions between 5.10 and 5.10.37, 5.11 and 5.11.21, as well as 5.12 and 5.12.4.
How do I fix CVE-2021-47064?
To fix CVE-2021-47064, update the Linux kernel to a version that is not affected, specifically above the impacted versions.
What causes CVE-2021-47064?
CVE-2021-47064 is caused by an uninitialized buffer in the mt76_dma_tx_queue_skb_raw function, potentially leading to DMA mapping leaks.
Is there a workaround for CVE-2021-47064?
There are no specific workarounds for CVE-2021-47064; updating the kernel is the recommended approach.

CVE-2021-47064: mt76: fix potential DMA mapping leak

Remedy

Remedy

Remedy

Remedy

Never miss a vulnerability like this again

Reference Links

Frequently Asked Questions

What is the severity of CVE-2021-47064?

What versions of the Linux kernel are affected by CVE-2021-47064?

How do I fix CVE-2021-47064?

What causes CVE-2021-47064?

Is there a workaround for CVE-2021-47064?

Company

Resources

Contact

Frequently Asked Questions

What is the severity of CVE-2021-47064?

What versions of the Linux kernel are affected by CVE-2021-47064?

How do I fix CVE-2021-47064?

What causes CVE-2021-47064?

Is there a workaround for CVE-2021-47064?