CVE-2026-90355 (GCVE-0-2026-90355)

Vulnerability from cvelistv5 – Published: 2026-09-17 16:09 – Updated: 2026-10-19 09:02
VLAI
Title
wifi: mt76: mt7996: clear stale link state on full reset
Summary
In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: mt7996: clear stale link state on full reset After a full chip reset, mac80211 reconfig replays interface, link and channel context setup. mt7996_vif_link_add() short-circuits when the link_id is still marked in mvif->valid_links, a state introduced for postponing link teardown to interface removal. The reset path frees the link structures without clearing those bits, so the replayed setup never re-creates dev_info/bss_info/STA records in the restarted firmware and never re-registers the link wcid, leaving the device inoperative. The reset path also leaks every allocated MLD index: per-link indices and the per-vif group/remap indices are re-allocated from scratch during reconfig, but the old bits stay set in the masks, so repeated full resets exhaust the index space. Clear valid_links in the reset vif iterator and reset the MLD index masks alongside the existing omac_mask clearing.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6639 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: ace5d3b6b49e8391beb4d7244348ba7da5298878 , < e512823aabbdc91444b9d886638f059ef58e86b1 (git)
Affected: ace5d3b6b49e8391beb4d7244348ba7da5298878 , < fc3762724a36867c1749233c43368c2637ecf029 (git)
Affected: ace5d3b6b49e8391beb4d7244348ba7da5298878 , < 75d2a4e2129b58bb0ddb842387299038495aad2a (git)
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Linux Linux Affected: 6.18
Unaffected: 0 , < 6.18 (semver)
Unaffected: 6.18.57 , ≤ 6.18.* (semver)
Unaffected: 7.2.6 , ≤ 7.2.* (semver)
Unaffected: 7.3 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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{
  "containers": {
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      "affected": [
        {
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          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/mediatek/mt76/mt7996/mac.c"
          ],
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mt76: mt7996: clear stale link state on full reset\n\nAfter a full chip reset, mac80211 reconfig replays interface, link and\nchannel context setup. mt7996_vif_link_add() short-circuits when the\nlink_id is still marked in mvif-\u003evalid_links, a state introduced for\npostponing link teardown to interface removal. The reset path frees the\nlink structures without clearing those bits, so the replayed setup never\nre-creates dev_info/bss_info/STA records in the restarted firmware and\nnever re-registers the link wcid, leaving the device inoperative.\n\nThe reset path also leaks every allocated MLD index: per-link indices\nand the per-vif group/remap indices are re-allocated from scratch during\nreconfig, but the old bits stay set in the masks, so repeated full\nresets exhaust the index space.\n\nClear valid_links in the reset vif iterator and reset the MLD index\nmasks alongside the existing omac_mask clearing."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T09:02:11.737Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        },
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    "datePublished": "2026-09-17T16:09:01.543Z",
    "dateReserved": "2026-09-11T19:38:34.806Z",
    "dateUpdated": "2026-10-19T09:02:11.737Z",
    "state": "PUBLISHED"
  },
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      "percentile": "0.10754"
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      "id": "msrc_CVE-2026-90355",
      "initial_release_date": "2026-10-20T22:22:32.000Z",
      "product_status:under_investigation": "1",
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      "title": "wifi: mt76: mt7996: clear stale link state on full reset",
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      "version": "2"
    },
    "nvd": {
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        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mt76: mt7996: clear stale link state on full reset\n\nAfter a full chip reset, mac80211 reconfig replays interface, link and\nchannel context setup. mt7996_vif_link_add() short-circuits when the\nlink_id is still marked in mvif-\u003evalid_links, a state introduced for\npostponing link teardown to interface removal. The reset path frees the\nlink structures without clearing those bits, so the replayed setup never\nre-creates dev_info/bss_info/STA records in the restarted firmware and\nnever re-registers the link wcid, leaving the device inoperative.\n\nThe reset path also leaks every allocated MLD index: per-link indices\nand the per-vif group/remap indices are re-allocated from scratch during\nreconfig, but the old bits stay set in the masks, so repeated full\nresets exhaust the index space.\n\nClear valid_links in the reset vif iterator and reset the MLD index\nmasks alongside the existing omac_mask clearing."
          }
        ],
        "id": "CVE-2026-90355",
        "lastModified": "2026-10-19T09:19:29.507",
        "metrics": {},
        "published": "2026-09-17T17:17:34.380",
        "references": [
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      "source": "Red Hat CSAF VEX",
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      "title": "kernel: wifi: mt76: mt7996: clear stale link state on full reset",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-90355.json",
      "version": "3"
    }
  }
}



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