CVE-2025-39795

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.

CVSS 3.1

5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS

0.2% chance of exploitation in the next 30 days; higher than 6% of CVEs (scores of 2026-10-25)

CWE

CWE-674

Published

2025-09-12

Modified

2026-10-19

Record from

the NVD, synced 2026-10-21

Affected

• debian:debian_linux
• linux:linux_kernel

References

• https://git.kernel.org/stable/c/14beeef4aafecc8a41de534e31fb5be94739392f
• https://git.kernel.org/stable/c/31f2f080898e50cbf2bae62d35f9f2a997547b38
• https://git.kernel.org/stable/c/3b9d69f0e68aa6b0acd9791c45d445154a8c66e9
• https://git.kernel.org/stable/c/418751910044649baa2b424ea31cce3fc4dcc253
• https://git.kernel.org/stable/c/448dfecc7ff807822ecd47a5c052acedca7d09e8

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