CVE-2026-90070 (GCVE-0-2026-90070)
Vulnerability from cvelistv5
Published
2026-09-17 16:05
Modified
2026-10-19 08:57
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: tpm: st33zp24: Return zero on status read failure st33zp24_status() ignores the result of the transport read and returns data even when no byte was received. The I2C transport, for example, skips i2c_master_recv() when the register-select write is short or fails, leaving data uninitialized. The resulting stack value can be interpreted as TPM_STS flags and let status checks complete spuriously. The status callback cannot propagate a transport error. Return zero unless recv() reports exactly one byte. With no status bits set, callers retry or take their existing timeout or error path instead of acting on an invalid status value. This issue was found by a static analysis checker and confirmed by manual source review.
References
Impacted products
Vendor Product Version
Linux Linux Version: 251a7b08213af82e40e4a70cac056e245853c410
Version: 251a7b08213af82e40e4a70cac056e245853c410
Version: 251a7b08213af82e40e4a70cac056e245853c410
Version: 251a7b08213af82e40e4a70cac056e245853c410
Version: 251a7b08213af82e40e4a70cac056e245853c410
Version: 251a7b08213af82e40e4a70cac056e245853c410
Version: 251a7b08213af82e40e4a70cac056e245853c410
Version: 251a7b08213af82e40e4a70cac056e245853c410
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntpm: st33zp24: Return zero on status read failure\n\nst33zp24_status() ignores the result of the transport read and returns\ndata even when no byte was received. The I2C transport, for example,\nskips i2c_master_recv() when the register-select write is short or fails,\nleaving data uninitialized. The resulting stack value can be interpreted\nas TPM_STS flags and let status checks complete spuriously.\n\nThe status callback cannot propagate a transport error. Return zero\nunless recv() reports exactly one byte. With no status bits set, callers\nretry or take their existing timeout or error path instead of acting on\nan invalid status value.\n\nThis issue was found by a static analysis checker and confirmed by manual\nsource review."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T08:57:27.372Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/4973e8386257eed10e5433a94a53bcc6ec37d2a1"
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          "url": "https://git.kernel.org/stable/c/1bfd5c54e40704ce93d128a25de3d8dd772bf183"
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          "url": "https://git.kernel.org/stable/c/38c26fe4522963a91d4fb02c844d8faa740fe9d1"
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        },
        {
          "url": "https://git.kernel.org/stable/c/8b92687708f5ef980de01c2042dbd76d11f78547"
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      "title": "tpm: st33zp24: Return zero on status read failure",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-90070",
    "datePublished": "2026-09-17T16:05:51.585Z",
    "dateReserved": "2026-09-11T19:38:34.784Z",
    "dateUpdated": "2026-10-19T08:57:27.372Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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