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CVE-2025-21793 – Linux Kernel SPI Division By Zero Vulnerability

The following table lists the changes that have been made to the
CVE-2025-21793 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

    Feb. 27, 2025

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

    spi: sn-f-ospi: Fix division by zero

    When there is no dummy cycle in the spi-nor commands, both dummy bus cycle
    bytes and width are zero. Because of the cpu’s warning when divided by
    zero, the warning should be avoided. Return just zero to avoid such
    calculations.
    Added Reference https://git.kernel.org/stable/c/3588b1c0fde2f58d166e3f94a5a58d64b893526c
    Added Reference https://git.kernel.org/stable/c/4df6f005bef04a3dd16c028124a1b5684db3922b
    Added Reference https://git.kernel.org/stable/c/7434135553bc03809a55803ee6a8dcaae6240d55
    Added Reference https://git.kernel.org/stable/c/966328191b4c389c0f2159fa242915f51cbc1679
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