{"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":"2026-08-17T04:51:41.271Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-08-17T04:51:41.271Z"},"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—only 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":"4911e4cb157cf87d5bdb3fa8e0c200032443371e","lessThan":"3c499851753a24d2e148d4e9ca51764c0c51554e","status":"affected","versionType":"git"},{"version":"4911e4cb157cf87d5bdb3fa8e0c200032443371e","lessThan":"55e014aaec650ede08b693ba59c8d0443f13f11c","status":"affected","versionType":"git"},{"version":"4911e4cb157cf87d5bdb3fa8e0c200032443371e","lessThan":"20b126920a259df4d7dcae19fcfe2c57a74d6b2e","status":"affected","versionType":"git"},{"version":"c9389e3f9453ec2d710e61830eafedddfd561226","status":"affected","versionType":"git"},{"version":"57d3f833087942ded1a8765b1b361454d3d39e8f","status":"affected","versionType":"git"},{"version":"6.12.13","lessThan":"6.13","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":"6.18.38","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":"6.14","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":"6.12.13"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.13.2"}]}]}],"references":[{"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"}}}}