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GHSA-XFH3-HF97-85M6

Vulnerability from github – Published: 2026-08-15 06:32 – Updated: 2026-08-17 06:33
VLAI
Details

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.

Severity
8.1 (High)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2026-74410"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-15T06:22:43Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: rtw88: fix OOB read from firmware RX descriptor exceeding DMA buffer\n\nIn rtw_pci_rx_napi(), new_len is computed as the sum of pkt_len (14-bit\ndescriptor field, max 16383) and pkt_offset (drv_info_sz + shift, both\nfirmware-controlled). The result can exceed RTK_PCI_RX_BUF_SIZE (11478),\ncausing an out-of-bounds read from the pre-allocated DMA buffer when\nskb_put_data copies new_len bytes. The USB transport already validates\nthis (rtw_usb_rx_data_put checks against RTW_USB_MAX_RECVBUF_SZ); the\nPCIe path does not.\n\nAdd a check that new_len does not exceed the DMA buffer size.",
  "id": "GHSA-xfh3-hf97-85m6",
  "modified": "2026-08-17T06:33:43Z",
  "published": "2026-08-15T06:32:33Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74410"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/01155ded5d4dad61840a9a3c33ab56778ef1f100"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/08193e733e5d4790e6c937af86d78793b02709be"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1554fa522f16ec7c5c342ad33fe734eeb6eb2452"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/26c183a86ea4dd1f2ff90c6f783649e7f5722a10"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/45abc14ab3f15da7d689f1a8809c1a01240a94d9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6a3c384393d3f0b41669ed5a2e88744aad9d87c8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6e76e9ed273dfb4b3333a5ebbb94958cc5752ab6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/913bd7d3d3d842b5c1d2b908a0201efa8fc79793"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}



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