CVE-2026-90070
tpm: st33zp24: Return zero on status read failure
Description
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.
INFO
Published Date :
Sept. 17, 2026, 5:16 p.m.
Last Modified :
Sept. 17, 2026, 5:16 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
- Ensure status reads return zero on transport failure.
- Verify only one byte is received before processing status.
- Update the Linux kernel to include the fix.
- Rely on existing timeouts or error paths for failures.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-90070.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-90070 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-90070
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
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The following list is the news that have been mention
CVE-2026-90070 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-90070 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Sep. 17, 2026
Action Type Old Value New Value Added Description 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. Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/90xxx/CVE-2026-90070.json">CVE-2026-90070</a> Added Reference https://git.kernel.org/stable/c/14feaa498c20c1b7ddefe27de5329aaff822cc0d Added Reference https://git.kernel.org/stable/c/1bfd5c54e40704ce93d128a25de3d8dd772bf183 Added Reference https://git.kernel.org/stable/c/38c26fe4522963a91d4fb02c844d8faa740fe9d1 Added Reference https://git.kernel.org/stable/c/4973e8386257eed10e5433a94a53bcc6ec37d2a1 Added Reference https://git.kernel.org/stable/c/8b92687708f5ef980de01c2042dbd76d11f78547 Added Reference https://git.kernel.org/stable/c/981307e2e8a930da492c2bcf763865c47c2a5165 Added Reference https://git.kernel.org/stable/c/d732cfc4befe28f02ec82ed5fd2bc2a21fbabd42 Added Reference https://git.kernel.org/stable/c/e6d7d9b665419cda3e9f91030d81c9f8ba71e51d