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.
How to fix
- Linux Linux913bd7d3d3d842b5c1d2b908a0201efa8fc79793, 45abc14ab3f15da7d689f1a8809c1a01240a94d9, 08193e733e5d4790e6c937af86d78793b02709be, 6a3c384393d3f0b41669ed5a2e88744aad9d87c8, 26c183a86ea4dd1f2ff90c6f783649e7f5722a10, 01155ded5d4dad61840a9a3c33ab56778ef1f100, 1554fa522f16ec7c5c342ad33fe734eeb6eb2452, 6e76e9ed273dfb4b3333a5ebbb94958cc5752ab6 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | e3037485c68ec1a299ff41160d8fedbd4abc29b9 ≤ v < 913bd7d3d3d842b5c1d2b908a0201efa8fc79793, e3037485c68ec1a299ff41160d8fedbd4abc29b9 ≤ v < 45abc14ab3f15da7d689f1a8809c1a01240a94d9, e3037485c68ec1a299ff41160d8fedbd4abc29b9 ≤ v < 08193e733e5d4790e6c937af86d78793b02709be, e3037485c68ec1a299ff41160d8fedbd4abc29b9 ≤ v < 6a3c384393d3f0b41669ed5a2e88744aad9d87c8, e3037485c68ec1a299ff41160d8fedbd4abc29b9 ≤ v < 26c183a86ea4dd1f2ff90c6f783649e7f5722a10, e3037485c68ec1a299ff41160d8fedbd4abc29b9 ≤ v < 01155ded5d4dad61840a9a3c33ab56778ef1f100, e3037485c68ec1a299ff41160d8fedbd4abc29b9 ≤ v < 1554fa522f16ec7c5c342ad33fe734eeb6eb2452, e3037485c68ec1a299ff41160d8fedbd4abc29b9 ≤ v < 6e76e9ed273dfb4b3333a5ebbb94958cc5752ab6, 5.2 | 913bd7d3d3d842b5c1d2b908a0201efa8fc79793, 45abc14ab3f15da7d689f1a8809c1a01240a94d9, 08193e733e5d4790e6c937af86d78793b02709be, 6a3c384393d3f0b41669ed5a2e88744aad9d87c8, 26c183a86ea4dd1f2ff90c6f783649e7f5722a10, 01155ded5d4dad61840a9a3c33ab56778ef1f100, 1554fa522f16ec7c5c342ad33fe734eeb6eb2452, 6e76e9ed273dfb4b3333a5ebbb94958cc5752ab6 |
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