{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-93799", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-18T17:59:28.789Z", "datePublished": "2026-09-24T16:02:32.174Z", "dateUpdated": "2026-10-03T10:57:33.642Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-03T10:57:33.642Z" }, "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": { "version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:A - The bad 5-bit sta_id is in BA_WINDOW_STATUS_NOTIFICATION (cmd 0x13) DMA'd from the Intel WiFi NIC. iwl_pcie_rx_handle_rb → iwl_op_mode_rx → iwl_mvm_rx → 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->ra_tid's 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 >= 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->sdata 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->head_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->sdata->local dereference in NAPI oopses or panics." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/wireless/intel/iwlwifi/mvm/rx.c" ], "versions": [ { "version": "3af512d6aac7eb6420086f124abb4426f5f4b369", "lessThan": "f9938eb95e2ddab4a58d3946a320abcbd60b56a4", "status": "affected", "versionType": "git" }, { "version": "3af512d6aac7eb6420086f124abb4426f5f4b369", "lessThan": "bb08fbbbd5568d33069485ecb0a1657f115a4e9f", "status": "affected", "versionType": "git" }, { "version": "3af512d6aac7eb6420086f124abb4426f5f4b369", "lessThan": "e35ae757c6462bfd3437bf58121bb721fe1f790c", "status": "affected", "versionType": "git" }, { "version": "3af512d6aac7eb6420086f124abb4426f5f4b369", "lessThan": "6aa77efaea9efea92e3090c35ad348fd759a3cf3", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/wireless/intel/iwlwifi/mvm/rx.c" ], "versions": [ { "version": "4.6", "status": "affected" }, { "version": "0", "lessThan": "4.6", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.158", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.111", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.53", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6", "versionEndExcluding": "6.6.158" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6", "versionEndExcluding": "6.12.111" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6", "versionEndExcluding": "6.18.53" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6", "versionEndExcluding": "7.2" } ] } ] } ], "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" } } } }