{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-63832", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T07:54:57.015Z", "datePublished": "2026-07-19T12:02:24.908Z", "dateUpdated": "2026-10-21T12:42:39.285Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-21T12:42:39.285Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mt76: add wcid publish check in mt76_sta_add\n\nSince mt7925_mac_sta_add publishes wcid, add publish check in mt76_sta_add\nto avoid reinitializing the wcid->poll_list.\n\nFound dev->sta_poll_list corruption when using mt7925 and 7.1-rc4.\nAccording to the corruption information, prev->next was changed to itself.\n\nwlan0: disconnect from AP 90:fb:5d:94:8b:e3 for new auth to 90:fb:5d:94:8b:e2\nwlan0: authenticate with 90:fb:5d:94:8b:e2 (local address=84:9e:56:9c:7e:6b)\nwlan0: send auth to 90:fb:5d:94:8b:e2 (try 1/3)\n slab kmalloc-8k start ffff8c80958a6000 pointer offset 4160 size 8192\nlist_add corruption. prev->next should be next (ffff8c808a7488f8), but was ffff8c80958a7040. (prev=ffff8c80958a7040).\n\n mt76_wcid_add_poll+0x95/0xd0 [mt76]\n mt7925_mac_add_txs.part.0+0xa5/0xe0 [mt7925_common]\n mt7925_rx_check+0xa7/0xc0 [mt7925_common]\n mt76_dma_rx_poll+0x50d/0x790 [mt76]\n mt792x_poll_rx+0x52/0xe0 [mt792x_lib]"}], "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 bug is reached through WiFi RX/TX-status DMA processing and station add during 802.11 association/roaming, both triggered by frames from a peer on the same wireless segment. Per kernel WiFi guidance, frame-driven driver bugs are Adjacent, not Network.\nAC:L - An adjacent attacker can reliably create the race by sending deauth/association traffic to force sta re-add while flooding data frames to keep the RX poll path active; both sides of the race are attacker-influenced and repeatable.\nPR:N - Exploitation requires no Linux privileges\u2014only the ability to send 802.11 management/data frames as a nearby WiFi peer (rogue AP, deauth attacker, or associating client on AP mode), with no authentication to the victim host.\nUI:N - No victim user action is required beyond normal WiFi operation; deauth-forced roaming and automatic reassociation drive the vulnerable sta_add path without user interaction.\nS:U - Impact is kernel heap/list corruption within the same security authority; this is not a VM escape, IOMMU bypass, or cross-namespace boundary violation.\nC:H - Reinitializing an embedded list_head while still linked corrupts kernel linked-list metadata in kmalloc-backed structures; list corruption is memory corruption that can be leveraged for arbitrary kernel memory disclosure.\nI:H - The corrupted doubly-linked list enables list-poisoning style arbitrary kernel writes and potential control-flow hijacking, not merely a bounded or transient modification.\nA:H - The reproducer triggers kernel list_add corruption detection and crash; corrupted sta_poll_list integrity can cause kernel panic/oops during normal WiFi operation."}]}], "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/mac80211.c"], "versions": [{"version": "c9389e3f9453ec2d710e61830eafedddfd561226", "lessThan": "720f39a9c60fdb604291c630f4f157753b376d68", "status": "affected", "versionType": "git"}, {"version": "4911e4cb157cf87d5bdb3fa8e0c200032443371e", "lessThan": "3c499851753a24d2e148d4e9ca51764c0c51554e", "status": "affected", "versionType": "git"}, {"version": "4911e4cb157cf87d5bdb3fa8e0c200032443371e", "lessThan": "55e014aaec650ede08b693ba59c8d0443f13f11c", "status": "affected", "versionType": "git"}, {"version": "4911e4cb157cf87d5bdb3fa8e0c200032443371e", "lessThan": "20b126920a259df4d7dcae19fcfe2c57a74d6b2e", "status": "affected", "versionType": "git"}, {"version": "57d3f833087942ded1a8765b1b361454d3d39e8f", "status": "affected", "versionType": "git"}, {"version": "6.12.13", "lessThan": "6.12.114", "status": "affected", "versionType": "semver"}, {"version": "6.13.2", "lessThan": "6.14", "status": "affected", "versionType": "semver"}]}, {"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/mac80211.c"], "versions": [{"version": "6.14", "status": "affected"}, {"version": "0", "lessThan": "6.14", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.114", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.38", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.3", "lessThanOrEqual": "7.1.*", "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": "6.12.13", "versionEndExcluding": "6.12.114"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.14", "versionEndExcluding": "6.18.38"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.14", "versionEndExcluding": "7.1.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.14", "versionEndExcluding": "7.2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.13.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/720f39a9c60fdb604291c630f4f157753b376d68"}, {"url": "https://git.kernel.org/stable/c/3c499851753a24d2e148d4e9ca51764c0c51554e"}, {"url": "https://git.kernel.org/stable/c/55e014aaec650ede08b693ba59c8d0443f13f11c"}, {"url": "https://git.kernel.org/stable/c/20b126920a259df4d7dcae19fcfe2c57a74d6b2e"}], "title": "wifi: mt76: add wcid publish check in mt76_sta_add", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-63832", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-16T15:31:24.788366Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-662", "description": "CWE-662 Improper Synchronization"}]}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-19T20:07:49.484Z"}}]}}