Buffer Overflow Risk in StarFive Hash Digest Handling for Linux Kernel

CVE-2025-68763

What is CVE-2025-68763?

A vulnerability in the Linux kernel related to the handling of return values in StarFive's hash digest function allows for improper error handling. When the sg_nents_for_len function returns negative error codes, these are improperly assigned to an unsigned long, which can lead to large positive integers. This oversight is a potential gateway for buffer overflow attacks, hence error checking mechanisms have been implemented to mitigate such risks by ensuring immediate termination on failure.

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