{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-90407",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2026-90407"
  ],
  "published": "2026-09-17T16:10:40Z",
  "summary": "wifi: ath11k: fix overreads in ath11k_wmi_process_csa_switch_count_event()",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: ath11k: fix overreads in ath11k_wmi_process_csa_switch_count_event()\n\nThere is no policy entry for WMI_TAG_PDEV_CSA_SWITCH_COUNT_STATUS_EVENT, so\nthe parse infrastructure does not enforce a minimum length for the event\nstruct. Additionally, the num_vdevs field is taken directly from firmware\nand used as a loop bound over the vdev_ids array without checking that it\nfits within the TLV payload. Either condition can cause an out-of-bounds\nread.\n\nAdd a TLV policy entry for WMI_TAG_PDEV_CSA_SWITCH_COUNT_STATUS_EVENT so\nthe parse infrastructure enforces a minimum length for the fixed-size event\nstruct. Add a helper ath11k_wmi_tlv_data_len() to recover the payload\nlength of a parsed TLV from the header preceding its data pointer. Use it\nin ath11k_wmi_process_csa_switch_count_event() to bound num_vdevs before\nthe loop.\n\nCompile tested only.",
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
      "versions": [
        "1:6.1.47-1+rpt4"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-2712",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v6",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7l",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v8",
            "binary_version": "1:6.1.47-1+rpt4"
          }
        ]
      },
      "database_specific": {
        "per_version": {
          "1:6.1.47-1+rpt4": {
            "linux_commit": "655fc658a15ae7a6f37103754adb39ba52a9a14e",
            "upstream_version": "6.1.47",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": null,
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-90407"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/f760b7d7e43584d2fa9bffcec1a04e502609f827"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/d6625dc5f1fe42cd81b8c57a1f5317afb9b410ce"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/0364926fb4bfb5b798e5fe2785b3023b4f767327"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/5de2b8c53714ad58f2fda118cd29ebbe31b38665"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/208d7fdb85976a737a715b81d54efaff6703880c"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-09-18T17:55:42Z"
  }
}