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GHSA-XQ4Q-93XC-52G2

Vulnerability from github – Published: 2026-07-19 12:30 – Updated: 2026-07-20 15:31

Details

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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-63832"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-19T12:16:56Z",
    "severity": "HIGH"
  },
  "details": "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]",
  "id": "GHSA-xq4q-93xc-52g2",
  "modified": "2026-07-20T15:31:47Z",
  "published": "2026-07-19T12:30:24Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63832"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/20b126920a259df4d7dcae19fcfe2c57a74d6b2e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3c499851753a24d2e148d4e9ca51764c0c51554e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/55e014aaec650ede08b693ba59c8d0443f13f11c"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

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

Vulnerability from cvelistv5 – Published: 2026-07-19 12:02 – Updated: 2026-08-17 04:51

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

Linux mitre root

References

3 references

URL	Tags
https://git.kernel.org/stable/c/3c499851753a24d2e…
https://git.kernel.org/stable/c/55e014aaec650ede0…
https://git.kernel.org/stable/c/20b126920a259df4d…

Impacted products

2 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)
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 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/mediatek/mt76/mac80211.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "3c499851753a24d2e148d4e9ca51764c0c51554e",
              "status": "affected",
              "version": "4911e4cb157cf87d5bdb3fa8e0c200032443371e",
              "versionType": "git"
            },
            {
              "lessThan": "55e014aaec650ede08b693ba59c8d0443f13f11c",
              "status": "affected",
              "version": "4911e4cb157cf87d5bdb3fa8e0c200032443371e",
              "versionType": "git"
            },
            {
              "lessThan": "20b126920a259df4d7dcae19fcfe2c57a74d6b2e",
              "status": "affected",
              "version": "4911e4cb157cf87d5bdb3fa8e0c200032443371e",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "c9389e3f9453ec2d710e61830eafedddfd561226",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "57d3f833087942ded1a8765b1b361454d3d39e8f",
              "versionType": "git"
            },
            {
              "lessThan": "6.13",
              "status": "affected",
              "version": "6.12.13",
              "versionType": "semver"
            },
            {
              "lessThan": "6.14",
              "status": "affected",
              "version": "6.13.2",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/mediatek/mt76/mac80211.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
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            {
              "status": "affected",
              "version": "6.14"
            },
            {
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.38",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.38",
                  "versionStartIncluding": "6.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.3",
                  "versionStartIncluding": "6.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "6.13.2",
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                }
              ],
              "negate": false,
              "operator": "OR"
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      ],
      "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]"
        }
      ],
      "metrics": [
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            "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 - 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."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T04:51:41.271Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "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"
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-63832",
    "datePublished": "2026-07-19T12:02:24.908Z",
    "dateReserved": "2026-07-19T07:54:57.015Z",
    "dateUpdated": "2026-08-17T04:51:41.271Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

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.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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GHSA-XQ4Q-93XC-52G2

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

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