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tpm: st33zp24: Return zero on status read failure

Type: advisorySources: OSV

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.

Products
Kernel
Affected versions
Not specified
Fixed versions
5.10.270, 5.15.221, 6.1.188, 6.12.110, 6.18.52, 6.6.157, 7.2.6
CVEs
CVE-2026-90070
Confirmed fixed CVEs
Not specified
Updated in this feed
3 Nov 2026, 01:24 UTC · Revision 1

Source evidence

tpm: st33zp24: Return zero on status read failure

core-osv · Original source

Published 17 Sept 2026, 16:05 UTC

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.

osv:CVE-2026-90070

Kernel

Fixed versions: 5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.110, 6.18.52, 7.2.6

Complete source record
{
  "id": "783e1a98353e8b3468c847b06f9260e2edcb086533e3837e5a6e86af5d90f0be",
  "url": "https://osv.dev/vulnerability/CVE-2026-90070",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "tpm: st33zp24: Return zero on status read failure",
    "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.",
    "evidence": "osv:CVE-2026-90070",
    "products": [
      {
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          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
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            "value": "5.10.270",
            "evidence": "/affected/1/ranges"
          },
          {
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            "evidence": "/affected/1/ranges"
          },
          {
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            "evidence": "/affected/1/ranges"
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            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.110",
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          {
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    "severity": "unknown",
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      "affected": [
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                  "introduced": "3.9.0"
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                  "introduced": "6.7.0"
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          ],
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            "ecosystem": "Linux"
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          }
        }
      ],
      "modified": "2026-10-28T02:30:24.816069988Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/14feaa498c20c1b7ddefe27de5329aaff822cc0d",
        "https://git.kernel.org/stable/c/1bfd5c54e40704ce93d128a25de3d8dd772bf183",
        "https://git.kernel.org/stable/c/38c26fe4522963a91d4fb02c844d8faa740fe9d1",
        "https://git.kernel.org/stable/c/4973e8386257eed10e5433a94a53bcc6ec37d2a1",
        "https://git.kernel.org/stable/c/8b92687708f5ef980de01c2042dbd76d11f78547",
        "https://git.kernel.org/stable/c/981307e2e8a930da492c2bcf763865c47c2a5165",
        "https://git.kernel.org/stable/c/d732cfc4befe28f02ec82ed5fd2bc2a21fbabd42",
        "https://git.kernel.org/stable/c/e6d7d9b665419cda3e9f91030d81c9f8ba71e51d",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90070.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-90070",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90070.json"
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    },
    "related_cves": [
      {
        "value": "CVE-2026-90070",
        "evidence": "/id"
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    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 491588,
  "published_at": "2026-09-17T16:05:51.585+00:00"
}