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CVE-2025-38671 – Linux Kernel i2c Qup Timeout Information Disclosure Vulnerability

The following table lists the changes that have been made to the
CVE-2025-38671 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.

  • New CVE Received
    by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Aug. 22, 2025

    Action Type Old Value New Value
    Added Description In the Linux kernel, the following vulnerability has been resolved:

    i2c: qup: jump out of the loop in case of timeout

    Original logic only sets the return value but doesn’t jump out of the
    loop if the bus is kept active by a client. This is not expected. A
    malicious or buggy i2c client can hang the kernel in this case and
    should be avoided. This is observed during a long time test with a
    PCA953x GPIO extender.

    Fix it by changing the logic to not only sets the return value, but also
    jumps out of the loop and return to the caller with -ETIMEDOUT.
    Added Reference https://git.kernel.org/stable/c/0d33913fce67a93c1eb83396c3c9d6b411dcab33
    Added Reference https://git.kernel.org/stable/c/42c4471b30fa203249f476dd42321cd7efb7f6a8
    Added Reference https://git.kernel.org/stable/c/89459f168b78e5c801dc8b7ad037b62898bc4f57
    Added Reference https://git.kernel.org/stable/c/a7982a14b3012527a9583d12525cd0dc9f8d8934
    Added Reference https://git.kernel.org/stable/c/c523bfba46c4b4d7676fb050909533a766698ecd
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