wifi: mt76: mt7996: validate RX band_idx before dereferencing phys[]

{
  "id": "a2d80daa6217b0d08c7142f121b4244d045b134676d8c2751e702cdfb5aec4e7",
  "url": "https://osv.dev/vulnerability/CVE-2026-90374",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "wifi: mt76: mt7996: validate RX band_idx before dereferencing phys[]",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: mt7996: validate RX band_idx before dereferencing phys[] band_idx comes from a 2-bit descriptor field (0-3) and was used directly to index dev->mt76.phys[] (size __MT_MAX_BAND == 3) and dereference the result. A corrupt or reserved descriptor value could index out of bounds or hit a NULL phy on parts with fewer bands. Reject invalid band indices, mirroring mt7996_rx_get_wcid().",
    "evidence": "osv:CVE-2026-90374",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.6.160",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.110",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.18.52",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.2.6",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-90374",
      "aliases": [
        "CVE-2026-90374"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "98686cd21624c75a043e96812beadddf4f6f48e5"
                },
                {
                  "fixed": "493a029c205a994644327d554f0cfeb9651aba7c"
                },
                {
                  "fixed": "535091c587268cc783608642838a655d828eefdd"
                },
                {
                  "fixed": "0f53ece876e1f3bbb3e18f48afc4af1ee967b16c"
                },
                {
                  "fixed": "b1c5cf8903bec5476a2233b4e45287b9a2213e02"
                },
                {
                  "fixed": "2243778a5fae8329ab5f18e7adcd7e03b911a1b7"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90374.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.2.0"
                },
                {
                  "fixed": "6.6.160"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.12.110"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.18.52"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "7.2.6"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90374.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:32.649392205Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/0f53ece876e1f3bbb3e18f48afc4af1ee967b16c",
        "https://git.kernel.org/stable/c/2243778a5fae8329ab5f18e7adcd7e03b911a1b7",
        "https://git.kernel.org/stable/c/493a029c205a994644327d554f0cfeb9651aba7c",
        "https://git.kernel.org/stable/c/535091c587268cc783608642838a655d828eefdd",
        "https://git.kernel.org/stable/c/b1c5cf8903bec5476a2233b4e45287b9a2213e02",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90374.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-90374",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90374.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-90374",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 499750,
  "published_at": "2026-09-17T16:09:14.067+00:00"
}