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CVE-2026-74410

wifi: rtw88: fix OOB read from firmware RX descriptor exceeding DMA buffer

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 5.10.261, 5.15.212, 6.1.178, 6.6.145, 6.12.97, and 2 more
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: none
  • Automatable: no
  • Technical impact: partial

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.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: none · Automatable: no · Technical impact: partial

  3. Record last updated

Affected versions

  • Linux Linux

    From e3037485c68ec1a299ff41160d8fedbd4abc29b9 · fixed in 913bd7d3d3d842b5c1d2b908a0201efa8fc79793; From e3037485c68ec1a299ff41160d8fedbd4abc29b9 · fixed in 45abc14ab3f15da7d689f1a8809c1a01240a94d9; From e3037485c68ec1a299ff41160d8fedbd4abc29b9 · fixed in 08193e733e5d4790e6c937af86d78793b02709be; From e3037485c68ec1a299ff41160d8fedbd4abc29b9 · fixed in 6a3c384393d3f0b41669ed5a2e88744aad9d87c8; From e3037485c68ec1a299ff41160d8fedbd4abc29b9 · fixed in 26c183a86ea4dd1f2ff90c6f783649e7f5722a10; From e3037485c68ec1a299ff41160d8fedbd4abc29b9 · fixed in 01155ded5d4dad61840a9a3c33ab56778ef1f100; From e3037485c68ec1a299ff41160d8fedbd4abc29b9 · fixed in 1554fa522f16ec7c5c342ad33fe734eeb6eb2452; From e3037485c68ec1a299ff41160d8fedbd4abc29b9 · fixed in 6e76e9ed273dfb4b3333a5ebbb94958cc5752ab6

  • Linux Linux

    5.2

  • KernelLinux

    From 5.2.0 · fixed in 5.10.261; From 5.11.0 · fixed in 5.15.212; From 5.16.0 · fixed in 6.1.178; From 6.2.0 · fixed in 6.6.145; From 6.7.0 · fixed in 6.12.97; From 6.13.0 · fixed in 6.18.40; From 6.19.0 · fixed in 7.1.5

References 8

git.kernel.org