{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "144c6cd24b3556e6e7a14271cee57a42ebf97450"
            },
            {
              "fixed": "ad445de67359f24088d4305c05fbd7e34c4e35e3"
            },
            {
              "fixed": "920101305e7601a33b9e01019f4ca526af2526ae"
            },
            {
              "fixed": "6d88244bb129755acca696f9227200f4a2d106a6"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.14.0"
            },
            {
              "fixed": "6.18.40"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74409.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: rtw89: add bounds check on firmware mac_id in link lookup\n\nThe mac_id field in RX descriptors is 8 bits wide (0-255), but\nassoc_link_on_macid[] has only RTW89_MAX_MAC_ID_NUM (128) entries.\nWhile the driver currently assigns mac_id values below 128, the\ndescriptor value comes from firmware and is not validated before use\nas an array index. Add a defensive bounds check in\nrtw89_assoc_link_rcu_dereference() to guard against out-of-range\nfirmware values.",
  "id": "CVE-2026-74409",
  "modified": "2026-08-16T03:30:52.837707796Z",
  "published": "2026-08-15T05:59:17.361Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6d88244bb129755acca696f9227200f4a2d106a6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/920101305e7601a33b9e01019f4ca526af2526ae"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ad445de67359f24088d4305c05fbd7e34c4e35e3"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74409.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74409"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "wifi: rtw89: add bounds check on firmware mac_id in link lookup"
}