{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "d5c65159f2895379e11ca13f62feabe93278985d"
            },
            {
              "fixed": "f760b7d7e43584d2fa9bffcec1a04e502609f827"
            },
            {
              "fixed": "d6625dc5f1fe42cd81b8c57a1f5317afb9b410ce"
            },
            {
              "fixed": "0364926fb4bfb5b798e5fe2785b3023b4f767327"
            },
            {
              "fixed": "5de2b8c53714ad58f2fda118cd29ebbe31b38665"
            },
            {
              "fixed": "208d7fdb85976a737a715b81d54efaff6703880c"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.6.0"
            },
            {
              "fixed": "6.6.157"
            }
          ],
          "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"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90407.json"
  },
  "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.",
  "id": "CVE-2026-90407",
  "modified": "2026-09-19T03:30:44.800540601Z",
  "published": "2026-09-17T16:09:35.420Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0364926fb4bfb5b798e5fe2785b3023b4f767327"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/208d7fdb85976a737a715b81d54efaff6703880c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5de2b8c53714ad58f2fda118cd29ebbe31b38665"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d6625dc5f1fe42cd81b8c57a1f5317afb9b410ce"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f760b7d7e43584d2fa9bffcec1a04e502609f827"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90407.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90407"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "wifi: ath11k: fix overreads in ath11k_wmi_process_csa_switch_count_event()"
}