{"api_version":"1","generated_at":"2026-10-27T04:01:46+00:00","cve":"CVE-2026-90380","urls":{"html":"https://cve.report/CVE-2026-90380","api":"https://cve.report/api/cve/CVE-2026-90380.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-90380","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-90380"},"summary":{"title":"wifi: mt76: mt792x: fix use-after-free in mt76_rx_poll_complete","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mt76: mt792x: fix use-after-free in mt76_rx_poll_complete\n\nA use-after-free issue occurs in mt76_rx_poll_complete due to a race\ncondition. The STA has already been removed, but the rx_status still\nhad a pointer to the wcid in the STA.\n\nSet the links' wcid pointers to be NULL for a MLD in\nmt7925_sta_pre_rcu_remove()\n\nBUG: KASAN: invalid-access in mt76_rx_poll_complete+0x280/0x470\nCall trace:\ndump_backtrace+0xec/0x128\nshow_stack+0x18/0x28\ndump_stack_lvl+0x40/0xc8\nprint_report+0x1b8/0x710\nkasan_report+0xe0/0x144\ndo_bad_area+0x120/0x260\ndo_tag_check_fault+0x20/0x34\ndo_mem_abort+0x54/0xa8\nel1_abort+0x3c/0x5c\nel1h_64_sync_handler+0x40/0xcc\nel1h_64_sync+0x7c/0x80\nmt76_rx_poll_complete+0x280/0x470\nmt76_dma_rx_poll+0x114/0x51c\nmt792x_poll_rx+0x60/0xf8\nnapi_threaded_poll_loop+0xe0/0x450\nnapi_threaded_poll+0x80/0x9c\nkthread+0x11c/0x158\nret_from_fork+0x10/0x20","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-17 17:17:37","updated_at":"2026-10-19 09:19:31"},"problem_types":[],"metrics":[{"version":"3.1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","score":"8.8","severity":"HIGH","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","data":{"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","attackVector":"ADJACENT_NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"8.8","severity":"HIGH","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","data":{"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"}}],"references":[{"url":"https://git.kernel.org/stable/c/aaf414bf81ab4b680580871784b0b929818188eb","name":"https://git.kernel.org/stable/c/aaf414bf81ab4b680580871784b0b929818188eb","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/b250943f3f8351385a17972bda001664a5c51008","name":"https://git.kernel.org/stable/c/b250943f3f8351385a17972bda001664a5c51008","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/2aa3d3b9fac9163e9226e35556607ae3f75be21e","name":"https://git.kernel.org/stable/c/2aa3d3b9fac9163e9226e35556607ae3f75be21e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/217f9e7bb02558759be9d9ecfe532e9708741c50","name":"https://git.kernel.org/stable/c/217f9e7bb02558759be9d9ecfe532e9708741c50","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-90380","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90380","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c948b5da6bbec742b433138e3e3f9537a85af2e5 aaf414bf81ab4b680580871784b0b929818188eb git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c948b5da6bbec742b433138e3e3f9537a85af2e5 2aa3d3b9fac9163e9226e35556607ae3f75be21e git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c948b5da6bbec742b433138e3e3f9537a85af2e5 b250943f3f8351385a17972bda001664a5c51008 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c948b5da6bbec742b433138e3e3f9537a85af2e5 217f9e7bb02558759be9d9ecfe532e9708741c50 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.7","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.7 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.110 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.57 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.6 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"90380","cve":"CVE-2026-90380","epss":"0.003090000","percentile":"0.238690000","score_date":"2026-09-21","updated_at":"2026-09-22 00:03:19"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/net/wireless/mediatek/mt76/mt7925/main.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"aaf414bf81ab4b680580871784b0b929818188eb","status":"affected","version":"c948b5da6bbec742b433138e3e3f9537a85af2e5","versionType":"git"},{"lessThan":"2aa3d3b9fac9163e9226e35556607ae3f75be21e","status":"affected","version":"c948b5da6bbec742b433138e3e3f9537a85af2e5","versionType":"git"},{"lessThan":"b250943f3f8351385a17972bda001664a5c51008","status":"affected","version":"c948b5da6bbec742b433138e3e3f9537a85af2e5","versionType":"git"},{"lessThan":"217f9e7bb02558759be9d9ecfe532e9708741c50","status":"affected","version":"c948b5da6bbec742b433138e3e3f9537a85af2e5","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/net/wireless/mediatek/mt76/mt7925/main.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.7"},{"lessThan":"6.7","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.110","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.57","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.6","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.110","versionStartIncluding":"6.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.57","versionStartIncluding":"6.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.6","versionStartIncluding":"6.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3","versionStartIncluding":"6.7","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mt76: mt792x: fix use-after-free in mt76_rx_poll_complete\n\nA use-after-free issue occurs in mt76_rx_poll_complete due to a race\ncondition. The STA has already been removed, but the rx_status still\nhad a pointer to the wcid in the STA.\n\nSet the links' wcid pointers to be NULL for a MLD in\nmt7925_sta_pre_rcu_remove()\n\nBUG: KASAN: invalid-access in mt76_rx_poll_complete+0x280/0x470\nCall trace:\ndump_backtrace+0xec/0x128\nshow_stack+0x18/0x28\ndump_stack_lvl+0x40/0xc8\nprint_report+0x1b8/0x710\nkasan_report+0xe0/0x144\ndo_bad_area+0x120/0x260\ndo_tag_check_fault+0x20/0x34\ndo_mem_abort+0x54/0xa8\nel1_abort+0x3c/0x5c\nel1h_64_sync_handler+0x40/0xcc\nel1h_64_sync+0x7c/0x80\nmt76_rx_poll_complete+0x280/0x470\nmt76_dma_rx_poll+0x114/0x51c\nmt792x_poll_rx+0x60/0xf8\nnapi_threaded_poll_loop+0xe0/0x450\nnapi_threaded_poll+0x80/0x9c\nkthread+0x11c/0x158\nret_from_fork+0x10/0x20"}],"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 - An 802.11be MLO peer's frames are DMA'd into mt792x_poll_rx→mt76_dma_rx_poll→mt7925_queue_rx_skb→mt7925_mac_fill_rx, which stores status->wcid from MT_RXD1_NORMAL_WLAN_IDX via mt792x_rx_get_wcid(); those bytes arrive over WiFi radio, which is adjacent rather than a routable IP transport.\nAC:L - The attacker drives both sides: data frames on a non-default MLO link keep mt76_rx_poll_complete using a secondary mt792x_link_sta.wcid that mt76_sta_pre_rcu_remove never NULLs, while a deauth/disassoc runs __sta_info_destroy. mt7925_mac_link_sta_remove then sleeps in MCU commands before clearing that idx, so the race is attacker-retryable.\nPR:N - mt76_rx_poll_complete and ieee80211_rx_mgmt_deauth→ieee80211_set_disassoc run on the WiFi RX path with no Linux credential or capability check; a radio-range MLO AP sending deauth plus data is enough, with no local account on the mt7925 client.\nUI:N - Once the mt7925 station VIF is already in an MLO association (WIPHY_FLAG_SUPPORTS_MLO is set only for NL80211_IFTYPE_STATION), the attacker triggers STA teardown and the concurrent RX by transmitting; no mount, click, or other victim action is required at exploit time.\nS:U - The UAF is of the mt792x_link_sta.wcid published in dev->wcid[] and later used in mt76_check_sta/mt76_rx_complete inside this host kernel; it does not cross a VM, IOMMU, or guest/host boundary.\nC:H - After the MLD STA is freed, mt76_check_sta and mt76_rx_convert still dereference status->wcid (wcid->sta, wcid->link_valid/link_id, wcid_to_sta()) from skb->cb, a use-after-free of the attacker-reallocatable mt792x_link_sta that enables arbitrary kernel reads.\nI:H - The same dangling wcid is written in mt76_check_sta (ewma_signal_add, wcid->inactive_count, PS flag bits) and in mt76_check_ccmp_pn (memcpy into wcid->rx_key_pn[] from the frame IV), giving a kernel write primitive through the freed mt792x_link_sta.\nA:H - KASAN already reports invalid-access in mt76_rx_poll_complete when the RX NAPI uses the freed wcid after STA removal; that use-after-free oopses or panics the kernel even without a full exploit."}]}],"providerMetadata":{"dateUpdated":"2026-10-19T09:02:39.607Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/aaf414bf81ab4b680580871784b0b929818188eb"},{"url":"https://git.kernel.org/stable/c/2aa3d3b9fac9163e9226e35556607ae3f75be21e"},{"url":"https://git.kernel.org/stable/c/b250943f3f8351385a17972bda001664a5c51008"},{"url":"https://git.kernel.org/stable/c/217f9e7bb02558759be9d9ecfe532e9708741c50"}],"title":"wifi: mt76: mt792x: fix use-after-free in mt76_rx_poll_complete","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-90380","datePublished":"2026-09-17T16:09:17.948Z","dateReserved":"2026-09-11T19:38:34.809Z","dateUpdated":"2026-10-19T09:02:39.607Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-17 17:17:37","lastModifiedDate":"2026-10-19 09:19:31","problem_types":[],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"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","attackVector":"ADJACENT_NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":2.8,"impactScore":5.9}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"90380","Ordinal":"1","Title":"wifi: mt76: mt792x: fix use-after-free in mt76_rx_poll_complete","CVE":"CVE-2026-90380","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"90380","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mt76: mt792x: fix use-after-free in mt76_rx_poll_complete\n\nA use-after-free issue occurs in mt76_rx_poll_complete due to a race\ncondition. The STA has already been removed, but the rx_status still\nhad a pointer to the wcid in the STA.\n\nSet the links' wcid pointers to be NULL for a MLD in\nmt7925_sta_pre_rcu_remove()\n\nBUG: KASAN: invalid-access in mt76_rx_poll_complete+0x280/0x470\nCall trace:\ndump_backtrace+0xec/0x128\nshow_stack+0x18/0x28\ndump_stack_lvl+0x40/0xc8\nprint_report+0x1b8/0x710\nkasan_report+0xe0/0x144\ndo_bad_area+0x120/0x260\ndo_tag_check_fault+0x20/0x34\ndo_mem_abort+0x54/0xa8\nel1_abort+0x3c/0x5c\nel1h_64_sync_handler+0x40/0xcc\nel1h_64_sync+0x7c/0x80\nmt76_rx_poll_complete+0x280/0x470\nmt76_dma_rx_poll+0x114/0x51c\nmt792x_poll_rx+0x60/0xf8\nnapi_threaded_poll_loop+0xe0/0x450\nnapi_threaded_poll+0x80/0x9c\nkthread+0x11c/0x158\nret_from_fork+0x10/0x20","Type":"Description","Title":"wifi: mt76: mt792x: fix use-after-free in mt76_rx_poll_complete"}]}}}