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tpm: st33zp24: Return zero on status read failure

Type: advisorySource: Official CVE List1 source record

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.

Announced Group revision 1
Original source ↗

CVE-2026-90070

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-2026-90070

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": "251a7b08213af82e40e4a70cac056e245853c410",
        "lessThan": "d732cfc4befe28f02ec82ed5fd2bc2a21fbabd42",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "251a7b08213af82e40e4a70cac056e245853c410",
        "lessThan": "4973e8386257eed10e5433a94a53bcc6ec37d2a1",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "251a7b08213af82e40e4a70cac056e245853c410",
        "lessThan": "981307e2e8a930da492c2bcf763865c47c2a5165",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "251a7b08213af82e40e4a70cac056e245853c410",
        "lessThan": "1bfd5c54e40704ce93d128a25de3d8dd772bf183",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "251a7b08213af82e40e4a70cac056e245853c410",
        "lessThan": "38c26fe4522963a91d4fb02c844d8faa740fe9d1",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "251a7b08213af82e40e4a70cac056e245853c410",
        "lessThan": "14feaa498c20c1b7ddefe27de5329aaff822cc0d",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "251a7b08213af82e40e4a70cac056e245853c410",
        "lessThan": "e6d7d9b665419cda3e9f91030d81c9f8ba71e51d",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "251a7b08213af82e40e4a70cac056e245853c410",
        "lessThan": "8b92687708f5ef980de01c2042dbd76d11f78547",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/char/tpm/st33zp24/st33zp24.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "3.9"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "3.9",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.270",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.221",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.188",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.157",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.110",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.52",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.6",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/char/tpm/st33zp24/st33zp24.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-90070

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#36487 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement

Revision history

  1. CVE-2026-90070 · Revision 1Source updated