CVE-2026-90367

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-90367", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.807Z", "datePublished": "2026-09-17T16:09:09.430Z", "dateUpdated": "2026-10-21T12:51:20.196Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-21T12:51:20.196Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mt76: mt7996: hold dev->mt76.mutex while disabling tx worker in SER\n\nmt7996_mac_reset_work() parked the tx worker and disabled the RX/TX NAPIs\nbefore taking dev->mt76.mutex. mt76_worker_disable()/_enable() are plain\nkthread park/unpark, not refcounted, and __mt76_set_channel() toggles the\nsame worker and the MT76_RESET bit under the mutex. An L1 SER racing a\nchannel switch could therefore have the worker unparked and MT76_RESET\ncleared while the reset path resets the DMA rings, corrupting descriptors\nor tokens. Take the mutex before disabling the worker, as mt7915 does."}], "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 - mt7996_irq_tasklet() handles MT_INT_MCU_CMD, reads MT_MCU_CMD, and on ERROR_MASK (including STOP_DMA) calls mt7996_reset() to queue L1 SER; the racing worker toggle is __mt76_set_channel() from mt76_switch_vif_chanctx() on an 802.11 Channel Switch Announcement. Both legs are WiFi radio-range, not a routable IP protocol.\nAC:L - A radio peer can drive both sides: emit CSA so ieee80211_csa_switch_work() runs mt76_switch_vif_chanctx()/__mt76_set_channel() (unparking the non-refcounted tx_worker under dev->mt76.mutex) and induce firmware L1 SER so mt7996_mac_reset_work() parks that worker before taking the mutex. The MCU channel-switch hold and napi_disable() are a retryable millisecond window.\nPR:N - mt7996_irq_tasklet() consumes MT_MCU_CMD and queues reset_work with no capable() or 802.11 authentication gate; CSA is parsed from beacons/action frames in ieee80211_sta_process_chanswitch() without a host uid. An unauthenticated (SER) or associated (CSA) radio peer needs no Linux privilege.\nUI:N - ieee80211_csa_switch_work() applies CSA automatically once the STA is associated, and mt7996_mac_reset_work() runs from the driver workqueue after the MCU IRQ. No local user must write debugfs sys_recovery or issue nl80211 SET_CHANNEL to create the race.\nS:U - The corrupted TX DMA descriptors (mt76_dma_queue_reset of q->desc[]) and token IDR (mt7996_tx_token_put()/idr_destroy()) belong to this host's mt7996 driver; the race does not cross a VM, IOMMU, or sandbox authority.\nC:H - If __mt76_set_channel() unparks tx_worker while mt7996_mac_reset_work() still runs mt7996_dma_reset() and mt7996_tx_token_put(), the worker can idr_alloc on a destroyed token IDR and DMA-map into q->desc[] being zeroed, a UAF/descriptor confusion that discloses kernel memory.\nI:H - The same race lets the TX worker write queue head and descriptors (mt76_dma_add_buf) while mt76_dma_queue_reset() clears q->desc[] and mt7996_tx_token_put() destroys the token IDR, a write primitive against DMA-ring and heap token objects suitable for control-flow hijack.\nA:H - Concurrent mt76_dma_tx_cleanup()/mt76_dma_queue_reset() versus a live tx_worker oopses on a freed txwi/skb or wedges the WFDMA rings; the commit's descriptor/token corruption is a kernel crash, so availability is High."}]}], "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/mt7996/mac.c"], "versions": [{"version": "27015b6fbcca836c6dbf196afc266e068af4aeec", "lessThan": "bc4f4389f439e808185778d298da36976d13d415", "status": "affected", "versionType": "git"}, {"version": "27015b6fbcca836c6dbf196afc266e068af4aeec", "lessThan": "69f23622533a4f054b5c8fdb226c3319ffa017b6", "status": "affected", "versionType": "git"}, {"version": "27015b6fbcca836c6dbf196afc266e068af4aeec", "lessThan": "906ad486ba5c4933d82e1ebe0685656390a48450", "status": "affected", "versionType": "git"}, {"version": "27015b6fbcca836c6dbf196afc266e068af4aeec", "lessThan": "594c4b7f89f9ea75dc9c50b5e4c4296db4a3d701", "status": "affected", "versionType": "git"}, {"version": "27015b6fbcca836c6dbf196afc266e068af4aeec", "lessThan": "6190db312b8230813f529f014b26247c6d9800d0", "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/mt7996/mac.c"], "versions": [{"version": "6.4", "status": "affected"}, {"version": "0", "lessThan": "6.4", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.160", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.114", "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": "6.4", "versionEndExcluding": "6.6.160"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "6.12.114"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "6.18.52"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "7.2.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/bc4f4389f439e808185778d298da36976d13d415"}, {"url": "https://git.kernel.org/stable/c/69f23622533a4f054b5c8fdb226c3319ffa017b6"}, {"url": "https://git.kernel.org/stable/c/906ad486ba5c4933d82e1ebe0685656390a48450"}, {"url": "https://git.kernel.org/stable/c/594c4b7f89f9ea75dc9c50b5e4c4296db4a3d701"}, {"url": "https://git.kernel.org/stable/c/6190db312b8230813f529f014b26247c6d9800d0"}], "title": "wifi: mt76: mt7996: hold dev->mt76.mutex while disabling tx worker in SER", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/net/wireless/mediatek/mt76/mt7996/mac.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "bc4f4389f439e808185778d298da36976d13d415", "status": "affected", "version": "27015b6fbcca836c6dbf196afc266e068af4aeec", "versionType": "git"}, {"lessThan": "69f23622533a4f054b5c8fdb226c3319ffa017b6", "status": "affected", "version": "27015b6fbcca836c6dbf196afc266e068af4aeec", "versionType": "git"}, {"lessThan": "906ad486ba5c4933d82e1ebe0685656390a48450", "status": "affected", "version": "27015b6fbcca836c6dbf196afc266e068af4aeec", "versionType": "git"}, {"lessThan": "594c4b7f89f9ea75dc9c50b5e4c4296db4a3d701", "status": "affected", "version": "27015b6fbcca836c6dbf196afc266e068af4aeec", "versionType": "git"}, {"lessThan": "6190db312b8230813f529f014b26247c6d9800d0", "status": "affected", "version": "27015b6fbcca836c6dbf196afc266e068af4aeec", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/net/wireless/mediatek/mt76/mt7996/mac.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.4"}, {"lessThan": "6.4", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.160", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.114", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.52", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.6", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mt76: mt7996: hold dev->mt76.mutex while disabling tx worker in SER\n\nmt7996_mac_reset_work() parked the tx worker and disabled the RX/TX NAPIs\nbefore taking dev->mt76.mutex. mt76_worker_disable()/_enable() are plain\nkthread park/unpark, not refcounted, and __mt76_set_channel() toggles the\nsame worker and the MT76_RESET bit under the mutex. An L1 SER racing a\nchannel switch could therefore have the worker unparked and MT76_RESET\ncleared while the reset path resets the DMA rings, corrupting descriptors\nor tokens. Take the mutex before disabling the worker, as mt7915 does."}], "id": "CVE-2026-90367", "lastModified": "2026-10-21T13:20:52.707", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-09-17T17:17:35.813", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/594c4b7f89f9ea75dc9c50b5e4c4296db4a3d701"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6190db312b8230813f529f014b26247c6d9800d0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/69f23622533a4f054b5c8fdb226c3319ffa017b6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/906ad486ba5c4933d82e1ebe0685656390a48450"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/bc4f4389f439e808185778d298da36976d13d415"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[27015b6fbcca836c6dbf196afc266e068af4aeec,906ad486ba5c4933d82e1ebe0685656390a48450)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[27015b6fbcca836c6dbf196afc266e068af4aeec,594c4b7f89f9ea75dc9c50b5e4c4296db4a3d701)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[27015b6fbcca836c6dbf196afc266e068af4aeec,6190db312b8230813f529f014b26247c6d9800d0)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "6.4"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.4)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.18.52,6.18.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2.6,7.2.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-09-19T14:15:17.563622+00:00", "updated": "2026-09-19T21:30:16.268160+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-362"]}