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mmc: sdio_uart: fix xmit_fifo leak when the port table is full

Type: advisorySource: Official CVE List1 source record

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.

Announced Source revision 1
Original source ↗

CVE-2026-98208

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-98208

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "8b197a5ce7a7218bb9fc721647ba0d5734f27348",
        "lessThan": "9e992d59138fcfaa4bad7cc0750265b0a8bca100",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "8b197a5ce7a7218bb9fc721647ba0d5734f27348",
        "lessThan": "b97b5b66c93cb4aaf6358727a73fff880a774dfd",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "8b197a5ce7a7218bb9fc721647ba0d5734f27348",
        "lessThan": "8a2c1bf209ba04cbd14153a771724bd5aa522fcd",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "8b197a5ce7a7218bb9fc721647ba0d5734f27348",
        "lessThan": "72f4c2b7a48423c708f2c348585419a1b71ab04c",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "8b197a5ce7a7218bb9fc721647ba0d5734f27348",
        "lessThan": "fd8223c53ad9553b2a349d2a40e19bbc6e60fc48",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "8b197a5ce7a7218bb9fc721647ba0d5734f27348",
        "lessThan": "ac866db277a4c73e84b4263773652e3aba326249",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "8b197a5ce7a7218bb9fc721647ba0d5734f27348",
        "lessThan": "5e142adbbdc54afbd01fad476c91cded41d22594",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "8b197a5ce7a7218bb9fc721647ba0d5734f27348",
        "lessThan": "53823e25793a97d07e6e98e0904bbf74cac8bc76",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/mmc/core/sdio_uart.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "2.6.34"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "2.6.34",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.271",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.222",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.189",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.158",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.112",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.54",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.8",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/mmc/core/sdio_uart.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-98208

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#38288 · Revision 1
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Publisher date
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