CVE-2026-98208 (GCVE-0-2026-98208)
Vulnerability from cvelistv5
Published
2026-10-06 08:44
Modified
2026-10-19 09:15
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: mmc: sdio_uart: fix xmit_fifo leak when the port table is full sdio_uart_add_port() allocates the transmit fifo before claiming a slot in sdio_uart_table[]. When all UART_NR slots are taken, it returns -EBUSY with the fifo still allocated, but the probe error path only kfree()s the port, leaking the transmit fifo. Free the fifo in the failure path of sdio_uart_add_port() itself so the function retains nothing on error.
References
Impacted products
Vendor Product Version
Linux Linux Version: 8b197a5ce7a7218bb9fc721647ba0d5734f27348
Version: 8b197a5ce7a7218bb9fc721647ba0d5734f27348
Version: 8b197a5ce7a7218bb9fc721647ba0d5734f27348
Version: 8b197a5ce7a7218bb9fc721647ba0d5734f27348
Version: 8b197a5ce7a7218bb9fc721647ba0d5734f27348
Version: 8b197a5ce7a7218bb9fc721647ba0d5734f27348
Version: 8b197a5ce7a7218bb9fc721647ba0d5734f27348
Version: 8b197a5ce7a7218bb9fc721647ba0d5734f27348
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{
  "containers": {
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/mmc/core/sdio_uart.c"
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          "vendor": "Linux",
          "versions": [
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              "version": "2.6.34"
            },
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "5.10.271",
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            {
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              "status": "unaffected",
              "version": "5.15.222",
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              "status": "unaffected",
              "version": "6.1.189",
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              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.158",
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            {
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              "version": "6.12.112",
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              "status": "unaffected",
              "version": "6.18.54",
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              "version": "7.2.8",
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              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
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              "cpeMatch": [
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              "negate": false,
              "operator": "OR"
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        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmmc: sdio_uart: fix xmit_fifo leak when the port table is full\n\nsdio_uart_add_port() allocates the transmit fifo before claiming a\nslot in sdio_uart_table[].  When all UART_NR slots are taken, it\nreturns -EBUSY with the fifo still allocated, but the probe error\npath only kfree()s the port, leaking the transmit fifo.\n\nFree the fifo in the failure path of sdio_uart_add_port() itself so\nthe function retains nothing on error."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T09:15:39.242Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/9e992d59138fcfaa4bad7cc0750265b0a8bca100"
        },
        {
          "url": "https://git.kernel.org/stable/c/b97b5b66c93cb4aaf6358727a73fff880a774dfd"
        },
        {
          "url": "https://git.kernel.org/stable/c/8a2c1bf209ba04cbd14153a771724bd5aa522fcd"
        },
        {
          "url": "https://git.kernel.org/stable/c/72f4c2b7a48423c708f2c348585419a1b71ab04c"
        },
        {
          "url": "https://git.kernel.org/stable/c/fd8223c53ad9553b2a349d2a40e19bbc6e60fc48"
        },
        {
          "url": "https://git.kernel.org/stable/c/ac866db277a4c73e84b4263773652e3aba326249"
        },
        {
          "url": "https://git.kernel.org/stable/c/5e142adbbdc54afbd01fad476c91cded41d22594"
        },
        {
          "url": "https://git.kernel.org/stable/c/53823e25793a97d07e6e98e0904bbf74cac8bc76"
        }
      ],
      "title": "mmc: sdio_uart: fix xmit_fifo leak when the port table is full",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98208",
    "datePublished": "2026-10-06T08:44:45.098Z",
    "dateReserved": "2026-09-25T10:25:14.325Z",
    "dateUpdated": "2026-10-19T09:15:39.242Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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