CVE-2026-90070

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.

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EPSS — Exploit Prediction

0.0022

Probability of exploitation

0.11%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

References

Other 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

Frequently Asked Questions

What is CVE-2026-90070? +

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.

How do I check if I'm vulnerable to CVE-2026-90070? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.