CVE-2026-63832 (GCVE-0-2026-63832)

Vulnerability from cvelistv5 – Published: 2026-07-19 12:02 – Updated: 2026-07-20 13:40
VLAI
Title
wifi: mt76: add wcid publish check in mt76_sta_add
Summary
In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: add wcid publish check in mt76_sta_add Since mt7925_mac_sta_add publishes wcid, add publish check in mt76_sta_add to avoid reinitializing the wcid->poll_list. Found dev->sta_poll_list corruption when using mt7925 and 7.1-rc4. According to the corruption information, prev->next was changed to itself. wlan0: disconnect from AP 90:fb:5d:94:8b:e3 for new auth to 90:fb:5d:94:8b:e2 wlan0: authenticate with 90:fb:5d:94:8b:e2 (local address=84:9e:56:9c:7e:6b) wlan0: send auth to 90:fb:5d:94:8b:e2 (try 1/3) slab kmalloc-8k start ffff8c80958a6000 pointer offset 4160 size 8192 list_add corruption. prev->next should be next (ffff8c808a7488f8), but was ffff8c80958a7040. (prev=ffff8c80958a7040). mt76_wcid_add_poll+0x95/0xd0 [mt76] mt7925_mac_add_txs.part.0+0xa5/0xe0 [mt7925_common] mt7925_rx_check+0xa7/0xc0 [mt7925_common] mt76_dma_rx_poll+0x50d/0x790 [mt76] mt792x_poll_rx+0x52/0xe0 [mt792x_lib]
Severity
8.8 (High)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 4911e4cb157cf87d5bdb3fa8e0c200032443371e , < 3c499851753a24d2e148d4e9ca51764c0c51554e (git)
Affected: 4911e4cb157cf87d5bdb3fa8e0c200032443371e , < 55e014aaec650ede08b693ba59c8d0443f13f11c (git)
Affected: 4911e4cb157cf87d5bdb3fa8e0c200032443371e , < 20b126920a259df4d7dcae19fcfe2c57a74d6b2e (git)
Affected: c9389e3f9453ec2d710e61830eafedddfd561226 (git)
Affected: 57d3f833087942ded1a8765b1b361454d3d39e8f (git)
Affected: 6.12.13 , < 6.13 (semver)
Affected: 6.13.2 , < 6.14 (semver)
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Linux Linux Affected: 6.14
Unaffected: 0 , < 6.14 (semver)
Unaffected: 6.18.38 , ≤ 6.18.* (semver)
Unaffected: 7.1.3 , ≤ 7.1.* (semver)
Unaffected: 7.2-rc1 , ≤ * (original_commit_for_fix)
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{
  "containers": {
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/mediatek/mt76/mac80211.c"
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              "versionType": "git"
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          "vendor": "Linux",
          "versions": [
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              "version": "6.14"
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              "version": "7.2-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
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          "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-\u003epoll_list.\n\nFound dev-\u003esta_poll_list corruption when using mt7925 and 7.1-rc4.\nAccording to the corruption information, prev-\u003enext 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-\u003enext 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]"
        }
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      "metrics": [
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            "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"
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      "providerMetadata": {
        "dateUpdated": "2026-07-20T13:40:35.633Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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        },
        {
          "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",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-63832",
    "datePublished": "2026-07-19T12:02:24.908Z",
    "dateReserved": "2026-07-19T07:54:57.015Z",
    "dateUpdated": "2026-07-20T13:40:35.633Z",
    "state": "PUBLISHED"
  },
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  "vulnerability-lookup:meta": {
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      "date": "2026-07-21",
      "epss": "0.00223",
      "percentile": "0.12989"
    },
    "microsoft_vex": {
      "current_release_date": "2026-07-20T14:43:34.000Z",
      "cve": "CVE-2026-63832",
      "id": "msrc_CVE-2026-63832",
      "initial_release_date": "2026-07-20T01:04:24.000Z",
      "product_status:known_affected": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "wifi: mt76: add wcid publish check in mt76_sta_add",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-63832.json",
      "version": "2"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-63832\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-07-19T12:16:56.600\",\"lastModified\":\"2026-07-20T15:16:49.943\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"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-\u003epoll_list.\\n\\nFound dev-\u003esta_poll_list corruption when using mt7925 and 7.1-rc4.\\nAccording to the corruption information, prev-\u003enext 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-\u003enext 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]\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/net/wireless/mediatek/mt76/mac80211.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"4911e4cb157cf87d5bdb3fa8e0c200032443371e\",\"lessThan\":\"3c499851753a24d2e148d4e9ca51764c0c51554e\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"4911e4cb157cf87d5bdb3fa8e0c200032443371e\",\"lessThan\":\"55e014aaec650ede08b693ba59c8d0443f13f11c\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"4911e4cb157cf87d5bdb3fa8e0c200032443371e\",\"lessThan\":\"20b126920a259df4d7dcae19fcfe2c57a74d6b2e\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"c9389e3f9453ec2d710e61830eafedddfd561226\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"57d3f833087942ded1a8765b1b361454d3d39e8f\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6.12.13\",\"lessThan\":\"6.13\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"6.13.2\",\"lessThan\":\"6.14\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/net/wireless/mediatek/mt76/mac80211.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.14\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.14\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.38\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.3\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2-rc1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"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}]},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/20b126920a259df4d7dcae19fcfe2c57a74d6b2e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/3c499851753a24d2e148d4e9ca51764c0c51554e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/55e014aaec650ede08b693ba59c8d0443f13f11c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-07-21T07:24:06+00:00",
      "cve": "CVE-2026-63832",
      "id": "CVE-2026-63832",
      "initial_release_date": "2026-07-19T00:00:00+00:00",
      "product_status:known_affected": "232",
      "product_status:known_not_affected": "42",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: wifi: mt76: add wcid publish check in mt76_sta_add",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-63832.json",
      "version": "3"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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