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

Vulnerability from cvelistv5 – Published: 2026-09-17 16:08 – Updated: 2026-09-17 16:08
VLAI
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
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 1609b014aa29f9a2bf3aaa93f71de4a06725845e , < 637bb99cc766a858d744905e46638459ca128b6c (git)
Affected: 1609b014aa29f9a2bf3aaa93f71de4a06725845e , < aff81505a84d27f83b4db8e039e813930cb23c2c (git)
Affected: 1609b014aa29f9a2bf3aaa93f71de4a06725845e , < 4330a0ef9f75a54fde3548432a9a698f06bab635 (git)
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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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          "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."
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      "providerMetadata": {
        "dateUpdated": "2026-09-17T16:08:57.539Z",
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        {
          "url": "https://git.kernel.org/stable/c/4330a0ef9f75a54fde3548432a9a698f06bab635"
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      "title": "wifi: mt76: mt7996: fix out-of-bounds link array access in mt7996_tx()",
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    "dateReserved": "2026-09-11T19:38:34.805Z",
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          }
        ],
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        "lastModified": "2026-09-17T17:17:33.700",
        "metrics": {},
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        "vulnStatus": "Received"
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}



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