CVE-2024-43881 Information

Description

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

Reference

https://git.kernel.org/stable/c/e99d9b16ff153de9540073239d24adc3b0a3a997 https://git.kernel.org/stable/c/6925320fcd40d8042d32bf4ede8248e7a5315c3b https://git.kernel.org/stable/c/33322e3ef07409278a18c6919c448e369d66a18e