CVE-2025-39795 – block: avoid possible overflow for chunk_sectors check in blk_stack_limits()

CVE ID : CVE-2025-39795

Published : Sept. 12, 2025, 4:15 p.m. | 29 minutes ago

Description : In the Linux kernel, the following vulnerability has been resolved:

block: avoid possible overflow for chunk_sectors check in blk_stack_limits()

In blk_stack_limits(), we check that the t->chunk_sectors value is a
multiple of the t->physical_block_size value.

However, by finding the chunk_sectors value in bytes, we may overflow
the unsigned int which holds chunk_sectors, so change the check to be
based on sectors.

Severity: 0.0 | NA

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