CVE-2026-74410

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxe3037485c68ec1a299ff41160d8fedbd4abc29b9 < 913bd7d3d3d842b5c1d2b908a0201efa8fc79793affected
LinuxLinuxe3037485c68ec1a299ff41160d8fedbd4abc29b9 < 45abc14ab3f15da7d689f1a8809c1a01240a94d9affected
LinuxLinuxe3037485c68ec1a299ff41160d8fedbd4abc29b9 < 08193e733e5d4790e6c937af86d78793b02709beaffected
LinuxLinuxe3037485c68ec1a299ff41160d8fedbd4abc29b9 < 6a3c384393d3f0b41669ed5a2e88744aad9d87c8affected
LinuxLinuxe3037485c68ec1a299ff41160d8fedbd4abc29b9 < 26c183a86ea4dd1f2ff90c6f783649e7f5722a10affected
LinuxLinuxe3037485c68ec1a299ff41160d8fedbd4abc29b9 < 01155ded5d4dad61840a9a3c33ab56778ef1f100affected
LinuxLinuxe3037485c68ec1a299ff41160d8fedbd4abc29b9 < 1554fa522f16ec7c5c342ad33fe734eeb6eb2452affected
LinuxLinuxe3037485c68ec1a299ff41160d8fedbd4abc29b9 < 6e76e9ed273dfb4b3333a5ebbb94958cc5752ab6affected
LinuxLinux5.2affected
LinuxLinux0 < 5.2unaffected
LinuxLinux5.10.261 <= 5.10.*unaffected
LinuxLinux5.15.212 <= 5.15.*unaffected
LinuxLinux6.1.178 <= 6.1.*unaffected
LinuxLinux6.6.145 <= 6.6.*unaffected
LinuxLinux6.12.97 <= 6.12.*unaffected
LinuxLinux6.18.40 <= 6.18.*unaffected
LinuxLinux7.1.5 <= 7.1.*unaffected
LinuxLinux7.2-rc1 <= *unaffected

Weaknesses

References