{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-90357", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.806Z", "datePublished": "2026-09-17T16:09:02.873Z", "dateUpdated": "2026-10-19T09:02:13.637Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:02:13.637Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mt76: mt7915: unlink TWT flow if the MCU rejects the agreement\n\nThe flow is added to dev->twt_list before sending the agreement to the\nfirmware, but the error path leaves it linked while flowid_mask is\nnever set. The flow slot can then be reused and memset while still on\nthe list, corrupting twt_list, and station removal leaves a dangling\nentry behind that mt7915_mac_twt_sched_list_add() later walks." } ], "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 - WLAN_S1G_TWT_SETUP action frames carry the TWT element into ieee80211_rx_h_action → ieee80211_process_rx_twt_action → ieee80211_s1g_rx_twt_setup → drv_add_twt_setup → mt7915_mac_add_twt_setup; the triggering bytes arrive over 802.11 radio on the AP’s LAN segment, so the vector is Adjacent.\nAC:L - After mt7915_mcu_twt_agrt_update(..., MCU_TWT_AGRT_ADD) fails, a second TWT setup from the same STA does memset/INIT_LIST_HEAD on the still-linked msta->twt.flow[] slot because flowid_mask was never set. The attacker induces that ADD failure (MCU timeout or mt76_dma_tx_queue_skb_raw queue-full) with their own traffic, then retries or deauths; not a victim-only race.\nPR:N - ieee80211_process_rx_twt_action only requires rx->sta on an AP with twt_responder; WLAN_CATEGORY_S1G TWT frames are not robust management frames, so MFP does not gate them. No Linux account or capability is needed: associating as a client to an open or guest mt7915 AP is enough to send the TWT setup.\nUI:N - The attacker sends the TWT Setup action frame and the follow-up retry or deauth; ieee80211_iface_work → ieee80211_s1g_rx_twt_action runs with no local user step. An already-running AP with twt_responder is standing configuration, not victim interaction during the attack.\nS:U - mt7915_mac_add_twt_setup corrupts the host kernel’s dev->twt_list and the mt7915_twt_flow embedded in sta->drv_priv; impact stays inside that kernel security authority and does not cross a VM, IOMMU, or guest-to-host boundary.\nC:H - On DISASSOC, mt7915_mac_twt_teardown_flow returns immediately when flowid_mask is unset, then sta_info_free kfree’s the sta while the node remains on twt_list. A later mt7915_mac_twt_sched_list_add walk reads the freed mt7915_twt_flow, a use-after-free of attacker-reallocatable sta slab.\nI:H - The retry path memset/INIT_LIST_HEAD of a still-linked flow, and list_add in mt7915_mac_twt_sched_list_add, write next/prev through corrupted or freed list nodes, yielding a kernel write primitive from list corruption and the DISASSOC use-after-free.\nA:H - mt7915_mac_twt_sched_list_add walking the corrupted or dangling twt_list oopses on a freed mt7915_twt_flow or spins forever on a self-linked node after INIT_LIST_HEAD, hanging or panicking the AP kernel." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/wireless/mediatek/mt76/mt7915/mac.c" ], "versions": [ { "version": "3782b69d03e714b8ff98b84c7426d8cef0e64d7c", "lessThan": "c09d1b15ed2dc49060303b16a296b7b8b7794cbe", "status": "affected", "versionType": "git" }, { "version": "3782b69d03e714b8ff98b84c7426d8cef0e64d7c", "lessThan": "1bd5c4ed2b9045faf83315c54cd37a9b7c71b5c7", "status": "affected", "versionType": "git" }, { "version": "3782b69d03e714b8ff98b84c7426d8cef0e64d7c", "lessThan": "cabe239e95b4eebf5b6c3654087b66ff9425bc7b", "status": "affected", "versionType": "git" }, { "version": "3782b69d03e714b8ff98b84c7426d8cef0e64d7c", "lessThan": "6bce0f1280c94af8314f895f404629da09f0788c", "status": "affected", "versionType": "git" }, { "version": "3782b69d03e714b8ff98b84c7426d8cef0e64d7c", "lessThan": "beaa42b875965dbc3e80e46970e0bfa60a94c2db", "status": "affected", "versionType": "git" }, { "version": "3782b69d03e714b8ff98b84c7426d8cef0e64d7c", "lessThan": "16a04441eab0dcd4d7126a6f66b370adbf28f96d", "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/mediatek/mt76/mt7915/mac.c" ], "versions": [ { "version": "5.16", "status": "affected" }, { "version": "0", "lessThan": "5.16", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.188", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.157", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.110", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.52", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2.6", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.3", "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": "5.16", "versionEndExcluding": "6.1.188" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.16", "versionEndExcluding": "6.6.157" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.16", "versionEndExcluding": "6.12.110" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.16", "versionEndExcluding": "6.18.52" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.16", "versionEndExcluding": "7.2.6" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.16", "versionEndExcluding": "7.3" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/c09d1b15ed2dc49060303b16a296b7b8b7794cbe" }, { "url": "https://git.kernel.org/stable/c/1bd5c4ed2b9045faf83315c54cd37a9b7c71b5c7" }, { "url": "https://git.kernel.org/stable/c/cabe239e95b4eebf5b6c3654087b66ff9425bc7b" }, { "url": "https://git.kernel.org/stable/c/6bce0f1280c94af8314f895f404629da09f0788c" }, { "url": "https://git.kernel.org/stable/c/beaa42b875965dbc3e80e46970e0bfa60a94c2db" }, { "url": "https://git.kernel.org/stable/c/16a04441eab0dcd4d7126a6f66b370adbf28f96d" } ], "title": "wifi: mt76: mt7915: unlink TWT flow if the MCU rejects the agreement", "x_generator": { "engine": "bippy-1.2.0" } } } }