CVE-2026-90375 (GCVE-0-2026-90375)

Vulnerability from cvelistv5 – Published: 2026-09-17 16:09 – Updated: 2026-09-17 16:09
VLAI
Title
wifi: mt76: fix non-AQL packet accounting for MLO stations
Summary
In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: fix non-AQL packet accounting for MLO stations __mt76_tx_queue_skb() overrides the wcid passed by the driver with sta->drv_priv, so the wcid might incorrectly be changed after TX, causing wcid->non_aql_packets to be counted on the wrong wcid. For example, on the AP side, if a station's setup link is the 5G link and the station uses 2G to transmit a frame, the value of non_aql_packets is increased on the 5G wcid but decreased on the 2G wcid. Once the inflated counter exceeds MT_MAX_NON_AQL_PKT, the TX scheduler permanently refuses to service the station. Drop the reassignment and account on the wcid used for transmission. This also records the actual wcid in the queue entry.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: e1378e5228aaa1bf6bb253a379c7de1722a94e00 , < f85f6933cc170155f1c7c2dffdd014965787c71b (git)
Affected: e1378e5228aaa1bf6bb253a379c7de1722a94e00 , < fc7fae55255ccbde009232e84b102d2782a69ecf (git)
Affected: e1378e5228aaa1bf6bb253a379c7de1722a94e00 , < 186c957ac3325aefb982567ffdd3654b283688a7 (git)
Affected: e1378e5228aaa1bf6bb253a379c7de1722a94e00 , < 8ae659743ba936b22ecb4620815887728e2820d6 (git)
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Linux Linux Affected: 5.10
Unaffected: 0 , < 5.10 (semver)
Unaffected: 6.12.110 , ≤ 6.12.* (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/tx.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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      "cpeApplicability": [
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                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mt76: fix non-AQL packet accounting for MLO stations\n\n__mt76_tx_queue_skb() overrides the wcid passed by the driver with\nsta-\u003edrv_priv, so the wcid might incorrectly be changed after TX,\ncausing wcid-\u003enon_aql_packets to be counted on the wrong wcid. For\nexample, on the AP side, if a station\u0027s setup link is the 5G link and\nthe station uses 2G to transmit a frame, the value of non_aql_packets\nis increased on the 5G wcid but decreased on the 2G wcid. Once the\ninflated counter exceeds MT_MAX_NON_AQL_PKT, the TX scheduler\npermanently refuses to service the station.\n\nDrop the reassignment and account on the wcid used for transmission.\nThis also records the actual wcid in the queue entry."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-17T16:09:14.730Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/f85f6933cc170155f1c7c2dffdd014965787c71b"
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        },
        {
          "url": "https://git.kernel.org/stable/c/186c957ac3325aefb982567ffdd3654b283688a7"
        },
        {
          "url": "https://git.kernel.org/stable/c/8ae659743ba936b22ecb4620815887728e2820d6"
        }
      ],
      "title": "wifi: mt76: fix non-AQL packet accounting for MLO stations",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-90375",
    "datePublished": "2026-09-17T16:09:14.730Z",
    "dateReserved": "2026-09-11T19:38:34.808Z",
    "dateUpdated": "2026-09-17T16:09:14.730Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-90375",
      "date": "2026-09-29",
      "epss": "0.00209",
      "percentile": "0.09906"
    },
    "nvd": {
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                "programFiles": [
                  "drivers/net/wireless/mediatek/mt76/tx.c"
                ],
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        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mt76: fix non-AQL packet accounting for MLO stations\n\n__mt76_tx_queue_skb() overrides the wcid passed by the driver with\nsta-\u003edrv_priv, so the wcid might incorrectly be changed after TX,\ncausing wcid-\u003enon_aql_packets to be counted on the wrong wcid. For\nexample, on the AP side, if a station\u0027s setup link is the 5G link and\nthe station uses 2G to transmit a frame, the value of non_aql_packets\nis increased on the 5G wcid but decreased on the 2G wcid. Once the\ninflated counter exceeds MT_MAX_NON_AQL_PKT, the TX scheduler\npermanently refuses to service the station.\n\nDrop the reassignment and account on the wcid used for transmission.\nThis also records the actual wcid in the queue entry."
          }
        ],
        "id": "CVE-2026-90375",
        "lastModified": "2026-09-17T17:17:36.720",
        "metrics": {},
        "published": "2026-09-17T17:17:36.720",
        "references": [
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        "vulnStatus": "Received"
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      "current_release_date": "2026-09-22T16:29:18Z",
      "cve": "CVE-2026-90375",
      "id": "CVE-2026-90375",
      "initial_release_date": "2026-09-22T16:29:18Z",
      "product_status:known_affected": "175",
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      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-90375",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-90375.json",
      "version": "2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.