201 lines
11 KiB
JSON
201 lines
11 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-93790",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-09-18T17:59:28.788Z",
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"datePublished": "2026-09-24T16:02:24.091Z",
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"dateUpdated": "2026-10-30T12:36:41.784Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-10-30T12:36:41.784Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: iwlwifi: mvm: fix out-of-bounds tid_data access in BA notif\n\nmvmsta->tid_data was indexed by the TFD loop counter 'i' instead of\nthe actual TID value 'tid'. This writes lq_color into a random tid_data\nslot unrelated to the BA entry.\nSince multi-TID blockack is not really in use, 'i' was always 0 and no\nharm was done.\nAdd a out-of-bound check before accessing the array."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 8.8,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:A - iwl_mvm_rx_ba_notif is the BA_NOTIF (0xc5) handler reached from iwl_pcie_rx_handle_rb → iwl_mvm_rx_mq → iwl_mvm_rx_common. The OOB index is tfd_cnt from iwl_compressed_ba_notif, firmware’s report of a received 802.11 Block Ack, so the triggering bytes arrive over WiFi radio range, not a routable IP protocol.\nAC:L - On the new-TX-API path, iwl_mvm_rx_ba_notif writes mvmsta->tid_data[i].lq_color for i in [0, tfd_cnt) with no cap against ARRAY_SIZE(tid_data) (9). tfd_cnt is a firmware __le16 gated only by struct_size(..., tfd, tfd_cnt) versus pkt_len; a single BA_NOTIF with tfd_cnt>=10 is a deterministic sync-RX write, not a race.\nPR:N - BA_NOTIF is RX_HANDLER_SYNC with no capable() or socket-cred check. iwl_mvm_sta_from_staid_rcu only needs sta_id to name a live fw_id_to_mac_id station (associated AP or client); the RF peer needs no host uid or capability.\nUI:N - iwl_mvm_rx_ba_notif runs from NAPI when firmware posts BA_NOTIF; the victim does not mount, open a file, or otherwise act to process the compressed BA once the WiFi interface already has a station.\nS:U - tid_data sits in iwl_mvm_sta inside ieee80211_sta->drv_priv; the overflow corrupts that host kernel object and adjacent heap, and does not cross a VM, IOMMU, or sandbox authority.\nC:H - Each loop stores lq_color (TX_RES_RATE_TABLE_COL_GET of tlc_rate_info) at tid_data[i]; with tfd_cnt>=10 those 40-byte-strided writes leave the 9-element array, smash vif/ptk_pn, and continue into neighboring kernel objects, a memory-corruption disclosure primitive.\nI:H - The same store is a kernel OOB write: at i=9 the lq_color write lands on iwl_mvm_sta->vif, and larger tfd_cnt walks ptk_pn[] and off the station object, enabling pointer corruption and control-flow hijack rather than a bounded LQ-color update.\nA:H - Corrupting vif or later heap pointers in iwl_mvm_sta makes the following iwl_mvm_tx_reclaim() (which reads mvmsta->vif and tid_data[tid]) and later station use oops; an unmapped-pointer dereference in RX softirq is a host kernel crash."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/net/wireless/intel/iwlwifi/mvm/tx.c"
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],
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"versions": [
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"lessThan": "ed9869e64dd7a397a320ae7a37f1e4a36f866f74",
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"drivers/net/wireless/intel/iwlwifi/mvm/tx.c"
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"version": "0",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1.191",
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"lessThanOrEqual": "6.1.*",
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},
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"lessThanOrEqual": "6.6.*",
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},
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"lessThanOrEqual": "6.18.*",
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"title": "wifi: iwlwifi: mvm: fix out-of-bounds tid_data access in BA notif",
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