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CVE-2026-90355

Status: ReceivedUnscored—

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.

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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.

CVSS

NVD hasn't assigned a CVSS score to this CVE (common since the April 2026 policy change).

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (1)

⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.

Linux — Linux KernelAI

References

Raw JSON (NVD)

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{
  "id": "CVE-2026-90355",
  "cveTags": [],
  "metrics": {},
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "ace5d3b6b49e8391beb4d7244348ba7da5298878",
              "lessThan": "fc3762724a36867c1749233c43368c2637ecf029",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "ace5d3b6b49e8391beb4d7244348ba7da5298878",
              "lessThan": "75d2a4e2129b58bb0ddb842387299038495aad2a",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/net/wireless/mediatek/mt76/mt7996/mac.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.18"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.18",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "7.2.6",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/net/wireless/mediatek/mt76/mt7996/mac.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-09-17T17:17:34.380",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/75d2a4e2129b58bb0ddb842387299038495aad2a",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/fc3762724a36867c1749233c43368c2637ecf029",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "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->valid_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."
    }
  ],
  "lastModified": "2026-09-17T17:17:34.380",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}