FKIE_CVE-2026-90070

Vulnerability from fkie_nvd - Published: 2026-09-17 17:16 - Updated: 2026-10-19 09:18
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
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/14feaa498c20c1b7ddefe27de5329aaff822cc0d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1bfd5c54e40704ce93d128a25de3d8dd772bf183
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/38c26fe4522963a91d4fb02c844d8faa740fe9d1
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4973e8386257eed10e5433a94a53bcc6ec37d2a1
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8b92687708f5ef980de01c2042dbd76d11f78547
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/981307e2e8a930da492c2bcf763865c47c2a5165
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d732cfc4befe28f02ec82ed5fd2bc2a21fbabd42
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e6d7d9b665419cda3e9f91030d81c9f8ba71e51d
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/char/tpm/st33zp24/st33zp24.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "d732cfc4befe28f02ec82ed5fd2bc2a21fbabd42",
              "status": "affected",
              "version": "251a7b08213af82e40e4a70cac056e245853c410",
              "versionType": "git"
            },
            {
              "lessThan": "4973e8386257eed10e5433a94a53bcc6ec37d2a1",
              "status": "affected",
              "version": "251a7b08213af82e40e4a70cac056e245853c410",
              "versionType": "git"
            },
            {
              "lessThan": "981307e2e8a930da492c2bcf763865c47c2a5165",
              "status": "affected",
              "version": "251a7b08213af82e40e4a70cac056e245853c410",
              "versionType": "git"
            },
            {
              "lessThan": "1bfd5c54e40704ce93d128a25de3d8dd772bf183",
              "status": "affected",
              "version": "251a7b08213af82e40e4a70cac056e245853c410",
              "versionType": "git"
            },
            {
              "lessThan": "38c26fe4522963a91d4fb02c844d8faa740fe9d1",
              "status": "affected",
              "version": "251a7b08213af82e40e4a70cac056e245853c410",
              "versionType": "git"
            },
            {
              "lessThan": "14feaa498c20c1b7ddefe27de5329aaff822cc0d",
              "status": "affected",
              "version": "251a7b08213af82e40e4a70cac056e245853c410",
              "versionType": "git"
            },
            {
              "lessThan": "e6d7d9b665419cda3e9f91030d81c9f8ba71e51d",
              "status": "affected",
              "version": "251a7b08213af82e40e4a70cac056e245853c410",
              "versionType": "git"
            },
            {
              "lessThan": "8b92687708f5ef980de01c2042dbd76d11f78547",
              "status": "affected",
              "version": "251a7b08213af82e40e4a70cac056e245853c410",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/char/tpm/st33zp24/st33zp24.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.9"
            },
            {
              "lessThan": "3.9",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.270",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.221",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.188",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.110",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.52",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "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."
    }
  ],
  "id": "CVE-2026-90070",
  "lastModified": "2026-10-19T09:18:55.597",
  "metrics": {},
  "published": "2026-09-17T17:16:55.940",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/14feaa498c20c1b7ddefe27de5329aaff822cc0d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/1bfd5c54e40704ce93d128a25de3d8dd772bf183"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/38c26fe4522963a91d4fb02c844d8faa740fe9d1"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/4973e8386257eed10e5433a94a53bcc6ec37d2a1"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/8b92687708f5ef980de01c2042dbd76d11f78547"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/981307e2e8a930da492c2bcf763865c47c2a5165"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d732cfc4befe28f02ec82ed5fd2bc2a21fbabd42"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e6d7d9b665419cda3e9f91030d81c9f8ba71e51d"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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