CVE-2026-74410

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: rtw88: fix OOB read from firmware RX descriptor exceeding DMA buffer In rtw_pci_rx_napi(), new_len is computed as the sum of pkt_len (14-bit descriptor field, max 16383) and pkt_offset (drv_info_sz + shift, both firmware-controlled). The result can exceed RTK_PCI_RX_BUF_SIZE (11478), causing an out-of-bounds read from the pre-allocated DMA buffer when skb_put_data copies new_len bytes. The USB transport already validates this (rtw_usb_rx_data_put checks against RTW_USB_MAX_RECVBUF_SZ); the PCIe path does not. Add a check that new_len does not exceed the DMA buffer size.

References

• https://git.kernel.org/stable/c/01155ded5d4dad61840a9a3c33ab56778ef1f100
• https://git.kernel.org/stable/c/08193e733e5d4790e6c937af86d78793b02709be
• https://git.kernel.org/stable/c/1554fa522f16ec7c5c342ad33fe734eeb6eb2452
• https://git.kernel.org/stable/c/26c183a86ea4dd1f2ff90c6f783649e7f5722a10
• https://git.kernel.org/stable/c/45abc14ab3f15da7d689f1a8809c1a01240a94d9