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vulnrichmentLinuxVULNRICHMENT:CVE-2024-43881
HistoryAug 21, 2024 - 12:06 a.m.

CVE-2024-43881 wifi: ath12k: change DMA direction while mapping reinjected packets

2024-08-2100:06:33
Linux
github.com
2
cve-2024-43881
linux kernel
vulnerability
ath12k
dma direction
reinjected packets
fragmented packets
hw ring
skb buffer
private information

AI Score

6.8

Confidence

Low

SSVC

Exploitation

none

Automatable

no

Technical Impact

partial

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

wifi: ath12k: change DMA direction while mapping reinjected packets

For fragmented packets, ath12k reassembles each fragment as a normal
packet and then reinjects it into HW ring. In this case, the DMA
direction should be DMA_TO_DEVICE, not DMA_FROM_DEVICE. Otherwise,
an invalid payload may be reinjected into the HW and
subsequently delivered to the host.

Given that arbitrary memory can be allocated to the skb buffer,
knowledge about the data contained in the reinjected buffer is lacking.
Consequently, there’s a risk of private information being leaked.

Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.1.1-00209-QCAHKSWPL_SILICONZ-1

AI Score

6.8

Confidence

Low

SSVC

Exploitation

none

Automatable

no

Technical Impact

partial

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