Vulnerability-Lookup

GHSA-763F-7F65-3WMX

Vulnerability from github – Published: 2026-09-17 18:32 – Updated: 2026-09-17 18:32

Details

In the Linux kernel, the following vulnerability has been resolved:

wifi: mt76: mt7996: fix out-of-bounds link array access in mt7996_tx()

When mac80211 leaves the link unspecified, mt7996_tx() substitutes the primary link id of the station or vif. That value is IEEE80211_LINK_UNSPECIFIED (0xf) until the first link has been added, and it is then used unchecked to index vif->link_conf[], mvif->mt76.link[] and sta->link[], all of which hold IEEE80211_MLD_MAX_NUM_LINKS (15) entries.

Clamp the primary link id to the default link before using it, and use the clamped value for the link_sta fallback as well.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-90349"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-17T17:17:33Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mt76: mt7996: fix out-of-bounds link array access in mt7996_tx()\n\nWhen mac80211 leaves the link unspecified, mt7996_tx() substitutes the\nprimary link id of the station or vif. That value is\nIEEE80211_LINK_UNSPECIFIED (0xf) until the first link has been added,\nand it is then used unchecked to index vif-\u003elink_conf[],\nmvif-\u003emt76.link[] and sta-\u003elink[], all of which hold\nIEEE80211_MLD_MAX_NUM_LINKS (15) entries.\n\nClamp the primary link id to the default link before using it, and use\nthe clamped value for the link_sta fallback as well.",
  "id": "GHSA-763f-7f65-3wmx",
  "modified": "2026-09-17T18:32:02Z",
  "published": "2026-09-17T18:32:02Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90349"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4330a0ef9f75a54fde3548432a9a698f06bab635"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/637bb99cc766a858d744905e46638459ca128b6c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/aff81505a84d27f83b4db8e039e813930cb23c2c"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-90349 (GCVE-0-2026-90349)

Vulnerability from cvelistv5 – Published: 2026-09-17 16:08 – Updated: 2026-09-17 16:08

Title

wifi: mt76: mt7996: fix out-of-bounds link array access in mt7996_tx()

Summary

In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: mt7996: fix out-of-bounds link array access in mt7996_tx() When mac80211 leaves the link unspecified, mt7996_tx() substitutes the primary link id of the station or vif. That value is IEEE80211_LINK_UNSPECIFIED (0xf) until the first link has been added, and it is then used unchecked to index vif->link_conf[], mvif->mt76.link[] and sta->link[], all of which hold IEEE80211_MLD_MAX_NUM_LINKS (15) entries. Clamp the primary link id to the default link before using it, and use the clamped value for the link_sta fallback as well.

Severity

No CVSS data available.

Assigner

Linux mitre root

References

3 references

URL	Tags
https://git.kernel.org/stable/c/637bb99cc766a858d…
https://git.kernel.org/stable/c/aff81505a84d27f83…
https://git.kernel.org/stable/c/4330a0ef9f75a54fd…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 1609b014aa29f9a2bf3aaa93f71de4a06725845e , < 637bb99cc766a858d744905e46638459ca128b6c (git) Affected: 1609b014aa29f9a2bf3aaa93f71de4a06725845e , < aff81505a84d27f83b4db8e039e813930cb23c2c (git) Affected: 1609b014aa29f9a2bf3aaa93f71de4a06725845e , < 4330a0ef9f75a54fde3548432a9a698f06bab635 (git)
Linux	Linux	Affected: 6.18 Unaffected: 0 , < 6.18 (semver) Unaffected: 6.18.52 , ≤ 6.18.* (semver) Unaffected: 7.2.6 , ≤ 7.2.* (semver) Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/mediatek/mt76/mt7996/main.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "637bb99cc766a858d744905e46638459ca128b6c",
              "status": "affected",
              "version": "1609b014aa29f9a2bf3aaa93f71de4a06725845e",
              "versionType": "git"
            },
            {
              "lessThan": "aff81505a84d27f83b4db8e039e813930cb23c2c",
              "status": "affected",
              "version": "1609b014aa29f9a2bf3aaa93f71de4a06725845e",
              "versionType": "git"
            },
            {
              "lessThan": "4330a0ef9f75a54fde3548432a9a698f06bab635",
              "status": "affected",
              "version": "1609b014aa29f9a2bf3aaa93f71de4a06725845e",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/mediatek/mt76/mt7996/main.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.18"
            },
            {
              "lessThan": "6.18",
              "status": "unaffected",
              "version": "0",
              "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-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.52",
                  "versionStartIncluding": "6.18",
                  "vulnerable": true
                },
                {
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                  "versionEndExcluding": "7.2.6",
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                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3-rc1",
                  "versionStartIncluding": "6.18",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mt76: mt7996: fix out-of-bounds link array access in mt7996_tx()\n\nWhen mac80211 leaves the link unspecified, mt7996_tx() substitutes the\nprimary link id of the station or vif. That value is\nIEEE80211_LINK_UNSPECIFIED (0xf) until the first link has been added,\nand it is then used unchecked to index vif-\u003elink_conf[],\nmvif-\u003emt76.link[] and sta-\u003elink[], all of which hold\nIEEE80211_MLD_MAX_NUM_LINKS (15) entries.\n\nClamp the primary link id to the default link before using it, and use\nthe clamped value for the link_sta fallback as well."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-17T16:08:57.539Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        },
        {
          "url": "https://git.kernel.org/stable/c/4330a0ef9f75a54fde3548432a9a698f06bab635"
        }
      ],
      "title": "wifi: mt76: mt7996: fix out-of-bounds link array access in mt7996_tx()",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-90349",
    "datePublished": "2026-09-17T16:08:57.539Z",
    "dateReserved": "2026-09-11T19:38:34.805Z",
    "dateUpdated": "2026-09-17T16:08:57.539Z",
    "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.

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-763F-7F65-3WMX

CVE-2026-90349 (GCVE-0-2026-90349)

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