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.

Metrics

No CVSS v4.0

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00177.

Key SSVC decision points have not yet been added.

Affected Vendors & Products

Vendors Products
Linux
  • Linux Kernel

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References
Link Providers
https://git.kernel.org/stable/c/01155ded5d4dad61840a9a3c33ab56778ef1f100 cve-icon cve-icon
https://git.kernel.org/stable/c/08193e733e5d4790e6c937af86d78793b02709be cve-icon cve-icon
https://git.kernel.org/stable/c/1554fa522f16ec7c5c342ad33fe734eeb6eb2452 cve-icon cve-icon
https://git.kernel.org/stable/c/26c183a86ea4dd1f2ff90c6f783649e7f5722a10 cve-icon cve-icon
https://git.kernel.org/stable/c/45abc14ab3f15da7d689f1a8809c1a01240a94d9 cve-icon cve-icon
https://git.kernel.org/stable/c/6a3c384393d3f0b41669ed5a2e88744aad9d87c8 cve-icon cve-icon
https://git.kernel.org/stable/c/6e76e9ed273dfb4b3333a5ebbb94958cc5752ab6 cve-icon cve-icon
https://git.kernel.org/stable/c/913bd7d3d3d842b5c1d2b908a0201efa8fc79793 cve-icon cve-icon
History

Sat, 15 Aug 2026 14:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-119
CWE-788

Sat, 15 Aug 2026 06:15:00 +0000

Type Values Removed Values Added
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.
Title wifi: rtw88: fix OOB read from firmware RX descriptor exceeding DMA buffer
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-08-15T05:59:18.039Z

Reserved: 2026-08-15T05:44:03.892Z

Link: CVE-2026-74410

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-08-15T06:22:43.043

Modified: 2026-08-15T06:22:43.043

Link: CVE-2026-74410

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-15T14:00:08Z