CVE-2026-90382 (GCVE-0-2026-90382)
Vulnerability from cvelistv5
Published
2026-09-17 16:09
Modified
2026-10-19 09:02
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: mt76x02: do not WARN on invalid rx descriptor length The MPDU length in the rx descriptor comes from the hardware. In monitor mode with the fcsfail filter enabled, the hardware passes up corrupted frames, and a corrupted frame can report a length larger than the received buffer. The bounds check correctly discards such frames, but its WARN_ON_ONCE wrapper means any over-the-air garbage frame taints the kernel, and panics it on the first such frame when panic_on_warn is set. Drop the WARN and discard the frame silently, matching what commit c2d4c8723dbf ("mt76x2: remove some harmless WARN_ONs in tx status and rx path") did for the neighboring rx and tx status paths. Observed immediately on rx with an MT7612U in fcsfail monitor mode on a busy channel.
References
Impacted products
Vendor Product Version
Linux Linux Version: 7bc04215a66b60e198aecaee8418f6d79fa19faa
Version: 7bc04215a66b60e198aecaee8418f6d79fa19faa
Version: 7bc04215a66b60e198aecaee8418f6d79fa19faa
Version: 7bc04215a66b60e198aecaee8418f6d79fa19faa
Version: 7bc04215a66b60e198aecaee8418f6d79fa19faa
Version: 7bc04215a66b60e198aecaee8418f6d79fa19faa
Version: 7bc04215a66b60e198aecaee8418f6d79fa19faa
Version: 7bc04215a66b60e198aecaee8418f6d79fa19faa
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{
  "containers": {
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/mediatek/mt76/mt76x02_mac.c"
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              "version": "0",
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              "versionType": "original_commit_for_fix"
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      "cpeApplicability": [
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              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mt76: mt76x02: do not WARN on invalid rx descriptor length\n\nThe MPDU length in the rx descriptor comes from the hardware. In\nmonitor mode with the fcsfail filter enabled, the hardware passes up\ncorrupted frames, and a corrupted frame can report a length larger\nthan the received buffer. The bounds check correctly discards such\nframes, but its WARN_ON_ONCE wrapper means any over-the-air garbage\nframe taints the kernel, and panics it on the first such frame when\npanic_on_warn is set.\n\nDrop the WARN and discard the frame silently, matching what\ncommit c2d4c8723dbf (\"mt76x2: remove some harmless WARN_ONs in tx\nstatus and rx path\") did for the neighboring rx and tx status paths.\n\nObserved immediately on rx with an MT7612U in fcsfail monitor mode\non a busy channel."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T09:02:43.423Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/61b1f6d92249bc34580ff19de7c69c805f82adca"
        },
        {
          "url": "https://git.kernel.org/stable/c/c65bbfc730df9ebf0fea8e286b0ad2dfab03dbfe"
        },
        {
          "url": "https://git.kernel.org/stable/c/d55e7aede542c4c76ead82d37d0c112f21eb2ac2"
        },
        {
          "url": "https://git.kernel.org/stable/c/b6e7958602bd1acdb8ae92703b6689a28bcc9bc0"
        },
        {
          "url": "https://git.kernel.org/stable/c/2d31e332c13b1db7745a7bd9cf74bc105524bcac"
        },
        {
          "url": "https://git.kernel.org/stable/c/17d6b89e09eac2d90272fceeba3644e92212e02f"
        },
        {
          "url": "https://git.kernel.org/stable/c/6def491fe9c4e83aa8cba62d74e9d4ab751ee967"
        },
        {
          "url": "https://git.kernel.org/stable/c/81497634d9f872fd3e8b03aada55574afff6f174"
        }
      ],
      "title": "wifi: mt76: mt76x02: do not WARN on invalid rx descriptor length",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-90382",
    "datePublished": "2026-09-17T16:09:19.247Z",
    "dateReserved": "2026-09-11T19:38:34.809Z",
    "dateUpdated": "2026-10-19T09:02:43.423Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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