CVE-2026-93799 (GCVE-0-2026-93799)
Vulnerability from cvelistv5
Published
2026-09-24 16:02
Modified
2026-10-03 10:57
Severity ?
8.8 (High) - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: wifi: iwlwifi: mvm: validate sta_id in BA window status notif BA_WINDOW_STATUS_NOTIFICATION_ID extracts a 5-bit sta_id from the firmware notification and uses it to index fw_id_to_mac_id[] without bounds checking. Validate sta_id before array access to prevent out-of-bounds indexing.
References
Impacted products
Vendor Product Version
Linux Linux Version: 3af512d6aac7eb6420086f124abb4426f5f4b369
Version: 3af512d6aac7eb6420086f124abb4426f5f4b369
Version: 3af512d6aac7eb6420086f124abb4426f5f4b369
Version: 3af512d6aac7eb6420086f124abb4426f5f4b369
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/intel/iwlwifi/mvm/rx.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "f9938eb95e2ddab4a58d3946a320abcbd60b56a4",
              "status": "affected",
              "version": "3af512d6aac7eb6420086f124abb4426f5f4b369",
              "versionType": "git"
            },
            {
              "lessThan": "bb08fbbbd5568d33069485ecb0a1657f115a4e9f",
              "status": "affected",
              "version": "3af512d6aac7eb6420086f124abb4426f5f4b369",
              "versionType": "git"
            },
            {
              "lessThan": "e35ae757c6462bfd3437bf58121bb721fe1f790c",
              "status": "affected",
              "version": "3af512d6aac7eb6420086f124abb4426f5f4b369",
              "versionType": "git"
            },
            {
              "lessThan": "6aa77efaea9efea92e3090c35ad348fd759a3cf3",
              "status": "affected",
              "version": "3af512d6aac7eb6420086f124abb4426f5f4b369",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/intel/iwlwifi/mvm/rx.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.6"
            },
            {
              "lessThan": "4.6",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.158",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.111",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.53",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.158",
                  "versionStartIncluding": "4.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.111",
                  "versionStartIncluding": "4.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.53",
                  "versionStartIncluding": "4.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "4.6",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: iwlwifi: mvm: validate sta_id in BA window status notif\n\nBA_WINDOW_STATUS_NOTIFICATION_ID extracts a 5-bit sta_id from the\nfirmware notification and uses it to index fw_id_to_mac_id[] without\nbounds checking. Validate sta_id before array access to prevent\nout-of-bounds indexing."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:A - The bad 5-bit sta_id is in BA_WINDOW_STATUS_NOTIFICATION (cmd 0x13) DMA\u0027d from the Intel WiFi NIC. iwl_pcie_rx_handle_rb \u2192 iwl_op_mode_rx \u2192 iwl_mvm_rx \u2192 iwl_mvm_rx_common dispatches that notif to iwl_mvm_window_status_notif, which reports received MPDUs in the BA window; that is WiFi radio range, not a routable IP protocol.\nAC:L - iwl_mvm_window_status_notif uses notif-\u003era_tid\u0027s 5-bit sta_id with no race or extra kernel gate beyond VALID and mpdu_rx_count != 0. A nearby peer that sends aggregated 802.11 traffic causes firmware to emit this BA window notif; once sta_id \u003e= num_stations the fw_id_to_mac_id[] OOB is deterministic.\nPR:N - iwl_mvm_window_status_notif is an RX_HANDLER_SYNC handler with no capability, socket, or 802.11 authentication check; iwl_mvm_rx_common invokes it from NAPI as soon as cmd 0x13 arrives. A radio-range attacker needs no host account.\nUI:N - The BA_WINDOW_STATUS_NOTIFICATION is processed automatically in iwl_pcie_napi_poll / iwl_mvm_rx_common on an already-up Intel WiFi interface; the attacker does not need the victim to open a file, mount media, or click through a prompt.\nS:U - The OOB index and the later type-confused ieee80211_mark_rx_ba_filtered_frames() call stay inside iwlwifi/mac80211 kernel memory on the same host; they do not cross a VM, IOMMU, or sandbox boundary.\nC:H - sta_id is 5 bits (0-31) but fw_id_to_mac_id[] has IWL_STATION_COUNT_MAX (16) entries, so sta_id 16-31 reads adjacent fw_id_to_link_sta[] pointers as ieee80211_sta*. ieee80211_mark_rx_ba_filtered_frames() then container_of()s that into sta_info and follows sta-\u003esdata and tid_rx, a type confusion that can disclose kernel memory.\nI:H - The same confused sta_info is used to write tid_agg_rx-\u003ehead_seq_num and reorder_buf_filtered and to release reorder-buffer frames into ieee80211_rx_handlers(), so the fw_id_to_link_sta versus ieee80211_sta type confusion is a kernel write / RX-injection primitive.\nA:H - Treating an ieee80211_link_sta* as ieee80211_sta* makes container_of() in ieee80211_mark_rx_ba_filtered_frames() compute a bogus sta_info, and the immediate sta-\u003esdata-\u003elocal dereference in NAPI oopses or panics."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-03T10:57:33.642Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/f9938eb95e2ddab4a58d3946a320abcbd60b56a4"
        },
        {
          "url": "https://git.kernel.org/stable/c/bb08fbbbd5568d33069485ecb0a1657f115a4e9f"
        },
        {
          "url": "https://git.kernel.org/stable/c/e35ae757c6462bfd3437bf58121bb721fe1f790c"
        },
        {
          "url": "https://git.kernel.org/stable/c/6aa77efaea9efea92e3090c35ad348fd759a3cf3"
        }
      ],
      "title": "wifi: iwlwifi: mvm: validate sta_id in BA window status notif",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-93799",
    "datePublished": "2026-09-24T16:02:32.174Z",
    "dateReserved": "2026-09-18T17:59:28.789Z",
    "dateUpdated": "2026-10-03T10:57:33.642Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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