CVE-2025-38519 Information

Aug 17, 2025 cve

Description

In the Linux kernel the following vulnerability has been resolved:

mm/damon: fix divide by zero in damon_get_intervals_score()

The current implementation allows having zero size regions with no special reasons but damon_get_intervals_score() gets crashed by divide by zero when the region size is zero.

[ 29.403950] Oops: divide error: 0000 [1] SMP NOPTI

This patch fixes the bug but does not disallow zero size regions to keep the backward compatibility since disallowing zero size regions might be a breaking change for some users.

In addition the same crash can happen when intervals_goal.access_bp is zero so this should be fixed in stable trees as well.

Reference

https://git.kernel.org/stable/c/bd225b9591442065beb876da72656f4a2d627d03 https://git.kernel.org/stable/c/ca4bb9ac706f05ead8ac1cce7b8245fc0645a687

CNNVD-202508-1937 (Published: 2025-08-16)

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