CVE-2021-47064

kernel: mt76: fix potential DMA mapping leak

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Severity

Low

Red Hat Product Security

2.3

CVSS 3.1

Review impact separately from score.

Published · February 29, 2024

Updated · November 21, 2025

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

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 2.3
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N

CWE-402 · Transmission of Private Resources into a New Sphere ('Resource Leak')