CVE-2021-47064

mt76: fix potential DMA mapping leak

Medium · published February 29, 2024

CVSS v3.1
5.3
EPSS
1%
Percentile
55.1
In the wild
Unconfirmed
What it is

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

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CVSS v4.0
Not supplied
EPSS
0.00768 · 55.1th percentile
Published
2024-02-29T22:37Z
EPSS history
Timeline
  • 29 FEB 22:37Z
    mt76: fix potential DMA mapping leak
    cvelistv5