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GHSA-XVMG-V5VR-XR53

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: validate RX band_idx before dereferencing phys[]

band_idx comes from a 2-bit descriptor field (0-3) and was used directly to index dev->mt76.phys[] (size __MT_MAX_BAND == 3) and dereference the result. A corrupt or reserved descriptor value could index out of bounds or hit a NULL phy on parts with fewer bands. Reject invalid band indices, mirroring mt7996_rx_get_wcid().

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{
  "affected": [],
  "aliases": [
    "CVE-2026-90374"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-17T17:17:36Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mt76: mt7996: validate RX band_idx before dereferencing phys[]\n\nband_idx comes from a 2-bit descriptor field (0-3) and was used directly\nto index dev-\u003emt76.phys[] (size __MT_MAX_BAND == 3) and dereference the\nresult. A corrupt or reserved descriptor value could index out of bounds\nor hit a NULL phy on parts with fewer bands. Reject invalid band indices,\nmirroring mt7996_rx_get_wcid().",
  "id": "GHSA-xvmg-v5vr-xr53",
  "modified": "2026-09-17T18:32:03Z",
  "published": "2026-09-17T18:32:03Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90374"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0f53ece876e1f3bbb3e18f48afc4af1ee967b16c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2243778a5fae8329ab5f18e7adcd7e03b911a1b7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/535091c587268cc783608642838a655d828eefdd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b1c5cf8903bec5476a2233b4e45287b9a2213e02"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-90374 (GCVE-0-2026-90374)

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

Title

wifi: mt76: mt7996: validate RX band_idx before dereferencing phys[]

Summary

In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: mt7996: validate RX band_idx before dereferencing phys[] band_idx comes from a 2-bit descriptor field (0-3) and was used directly to index dev->mt76.phys[] (size __MT_MAX_BAND == 3) and dereference the result. A corrupt or reserved descriptor value could index out of bounds or hit a NULL phy on parts with fewer bands. Reject invalid band indices, mirroring mt7996_rx_get_wcid().

Severity

No CVSS data available.

Assigner

Linux mitre root Scorecard

References

4 references

URL	Tags
https://git.kernel.org/stable/c/535091c587268cc78…
https://git.kernel.org/stable/c/0f53ece876e1f3bbb…
https://git.kernel.org/stable/c/b1c5cf8903bec5476…
https://git.kernel.org/stable/c/2243778a5fae8329a…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 98686cd21624c75a043e96812beadddf4f6f48e5 , < 535091c587268cc783608642838a655d828eefdd (git) Affected: 98686cd21624c75a043e96812beadddf4f6f48e5 , < 0f53ece876e1f3bbb3e18f48afc4af1ee967b16c (git) Affected: 98686cd21624c75a043e96812beadddf4f6f48e5 , < b1c5cf8903bec5476a2233b4e45287b9a2213e02 (git) Affected: 98686cd21624c75a043e96812beadddf4f6f48e5 , < 2243778a5fae8329ab5f18e7adcd7e03b911a1b7 (git)
Linux	Linux	Affected: 6.2 Unaffected: 0 , < 6.2 (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/mt7996/mac.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "535091c587268cc783608642838a655d828eefdd",
              "status": "affected",
              "version": "98686cd21624c75a043e96812beadddf4f6f48e5",
              "versionType": "git"
            },
            {
              "lessThan": "0f53ece876e1f3bbb3e18f48afc4af1ee967b16c",
              "status": "affected",
              "version": "98686cd21624c75a043e96812beadddf4f6f48e5",
              "versionType": "git"
            },
            {
              "lessThan": "b1c5cf8903bec5476a2233b4e45287b9a2213e02",
              "status": "affected",
              "version": "98686cd21624c75a043e96812beadddf4f6f48e5",
              "versionType": "git"
            },
            {
              "lessThan": "2243778a5fae8329ab5f18e7adcd7e03b911a1b7",
              "status": "affected",
              "version": "98686cd21624c75a043e96812beadddf4f6f48e5",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/mediatek/mt76/mt7996/mac.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.2"
            },
            {
              "lessThan": "6.2",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.110",
              "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": "6.12.110",
                  "versionStartIncluding": "6.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.52",
                  "versionStartIncluding": "6.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.6",
                  "versionStartIncluding": "6.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3-rc1",
                  "versionStartIncluding": "6.2",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mt76: mt7996: validate RX band_idx before dereferencing phys[]\n\nband_idx comes from a 2-bit descriptor field (0-3) and was used directly\nto index dev-\u003emt76.phys[] (size __MT_MAX_BAND == 3) and dereference the\nresult. A corrupt or reserved descriptor value could index out of bounds\nor hit a NULL phy on parts with fewer bands. Reject invalid band indices,\nmirroring mt7996_rx_get_wcid()."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-17T16:09:14.067Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/535091c587268cc783608642838a655d828eefdd"
        },
        {
          "url": "https://git.kernel.org/stable/c/0f53ece876e1f3bbb3e18f48afc4af1ee967b16c"
        },
        {
          "url": "https://git.kernel.org/stable/c/b1c5cf8903bec5476a2233b4e45287b9a2213e02"
        },
        {
          "url": "https://git.kernel.org/stable/c/2243778a5fae8329ab5f18e7adcd7e03b911a1b7"
        }
      ],
      "title": "wifi: mt76: mt7996: validate RX band_idx before dereferencing phys[]",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-90374",
    "datePublished": "2026-09-17T16:09:14.067Z",
    "dateReserved": "2026-09-11T19:38:34.808Z",
    "dateUpdated": "2026-09-17T16:09:14.067Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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Confirmed: The vulnerability has been validated from an analyst's perspective.
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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-XVMG-V5VR-XR53

CVE-2026-90374 (GCVE-0-2026-90374)

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