{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "f0457842215438786e2e205ad06a4fbb8ab63cd0"
            },
            {
              "fixed": "36c85f7029484d5ede769f8873d16e9c8e35533c"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "d019930b0049fc2648a6b279893d8ad330596e81"
            },
            {
              "fixed": "c411cf1bfde951cfa821809cf4020ba177f76e0c"
            },
            {
              "fixed": "624fb79dadc1b65757986a9d0fdde5c0cf3fe179"
            },
            {
              "fixed": "70d37a8b9229e394cc17ddad47e90b81d80fcd09"
            },
            {
              "fixed": "634a4408c0615c523cf7531790f4f14a422b9206"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "6.6.142"
            },
            {
              "fixed": "6.6.144"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.6.144"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.88"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.11.0"
            },
            {
              "fixed": "6.18.30"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "7.0.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46140.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: btmtk: validate WMT event SKB length before struct access\n\nbtmtk_usb_hci_wmt_sync() casts the WMT event response SKB data to\nstruct btmtk_hci_wmt_evt (7 bytes) and struct btmtk_hci_wmt_evt_funcc\n(9 bytes) without first checking that the SKB contains enough data.\nA short firmware response causes out-of-bounds reads from SKB tailroom.\n\nUse skb_pull_data() to validate and advance past the base WMT event\nheader. For the FUNC_CTRL case, pull the additional status field bytes\nbefore accessing them.",
  "id": "CVE-2026-46140",
  "modified": "2026-07-08T05:38:03.350332398Z",
  "published": "2026-05-28T09:35:56.104Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/36c85f7029484d5ede769f8873d16e9c8e35533c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/624fb79dadc1b65757986a9d0fdde5c0cf3fe179"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/634a4408c0615c523cf7531790f4f14a422b9206"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/70d37a8b9229e394cc17ddad47e90b81d80fcd09"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c411cf1bfde951cfa821809cf4020ba177f76e0c"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46140.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46140"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.7.5",
  "summary": "Bluetooth: btmtk: validate WMT event SKB length before struct access"
}