CVE-2026-93807 (GCVE-0-2026-93807)
Vulnerability from cvelistv5
Published
2026-09-24 16:02
Modified
2026-10-03 10:57
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: wifi: rsi: avoid reading TKIP MIC keys for non-TKIP ciphers rsi_hal_load_key() copies tx_mic_key and rx_mic_key from data[16] and data[24] whenever key data is present. Those offsets are only part of the 32-byte TKIP key layout. Shorter keys used by other ciphers, such as CCMP, do not provide those bytes, so the unconditional copies can read past the supplied key buffer. Only copy the MIC keys for TKIP, and reject malformed TKIP keys that are shorter than the expected 32-byte layout. [drop useless length check]
References
Impacted products
Vendor Product Version
Linux Linux Version: dad0d04fa7ba41ce603a01e8e64967650303e9a2
Version: dad0d04fa7ba41ce603a01e8e64967650303e9a2
Version: dad0d04fa7ba41ce603a01e8e64967650303e9a2
Version: dad0d04fa7ba41ce603a01e8e64967650303e9a2
Version: dad0d04fa7ba41ce603a01e8e64967650303e9a2
Version: dad0d04fa7ba41ce603a01e8e64967650303e9a2
Version: dad0d04fa7ba41ce603a01e8e64967650303e9a2
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{
  "containers": {
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          "programFiles": [
            "drivers/net/wireless/rsi/rsi_91x_mgmt.c"
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          ],
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          "vendor": "Linux",
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              "version": "3.15"
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              "version": "0",
              "versionType": "semver"
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              "version": "6.1.189",
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              "version": "6.12.111",
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            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.53",
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            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.271",
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                  "vulnerable": true
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              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: rsi: avoid reading TKIP MIC keys for non-TKIP ciphers\n\nrsi_hal_load_key() copies tx_mic_key and rx_mic_key from data[16] and\ndata[24] whenever key data is present. Those offsets are only part of\nthe 32-byte TKIP key layout. Shorter keys used by other ciphers, such as\nCCMP, do not provide those bytes, so the unconditional copies can read\npast the supplied key buffer.\n\nOnly copy the MIC keys for TKIP, and reject malformed TKIP keys that are\nshorter than the expected 32-byte layout.\n\n[drop useless length check]"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-03T10:57:40.321Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/6937b06d55b528e961feff8cc083b97ede622e02"
        },
        {
          "url": "https://git.kernel.org/stable/c/ebd7172f8c4edc232738ef50338fb773c6f6c208"
        },
        {
          "url": "https://git.kernel.org/stable/c/6b6690ac5c35e803df14afdc44312d11e8a60893"
        },
        {
          "url": "https://git.kernel.org/stable/c/5207727e53fba1e3a6fce9b2c15b6b8b06c6438b"
        },
        {
          "url": "https://git.kernel.org/stable/c/5902e3c08c63d65724772f74d65b9fb032625dca"
        },
        {
          "url": "https://git.kernel.org/stable/c/55b86ef6c2e68879ffd95203b011ef42a013ab88"
        },
        {
          "url": "https://git.kernel.org/stable/c/843fe9bc583b7686ca68312ac9319c9240a73c03"
        }
      ],
      "title": "wifi: rsi: avoid reading TKIP MIC keys for non-TKIP ciphers",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-93807",
    "datePublished": "2026-09-24T16:02:41.356Z",
    "dateReserved": "2026-09-18T17:59:28.790Z",
    "dateUpdated": "2026-10-03T10:57:40.321Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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