CVE-2025-39916: debian linux — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: mm/damon/reclaim: avoid divide-by-zero in damon_reclaim_apply_parameters() When creating a new scheme of DAMON_RECLAIM, the calculation of 'min_age_region' uses 'aggr_interval' as the divisor, which may lead to division-by-zero errors. Fix it by directly returning -EINVAL when such a case occurs.

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CVSS v3.1 Score

5.5

MEDIUM

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

Weakness Type (CWE)

CWE-369 CWE-369

Affected Products

Vendor	Product	Versions
linux	linux_kernel	6.0.12 — 6.1.153
linux	linux_kernel	6.2 — 6.6.107
linux	linux_kernel	6.7 — 6.12.48
linux	linux_kernel	6.13 — 6.16.8
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
debian	debian_linux	All

References

Advisories & Patches

https://git.kernel.org/stable/c/40cb9b38b645126fdd1d6aa3d6811a8ad50ddfa1 https://git.kernel.org/stable/c/5d6eeb3c683c777ed4538eb3a650bb7da17a7cff https://git.kernel.org/stable/c/64dc351e58271c1e9005e42f5216b4f3d7a39b66 https://git.kernel.org/stable/c/9fe0415156fbde773b31f920201cb70b1f0e40fe https://git.kernel.org/stable/c/e6b543ca9806d7bced863f43020e016ee996c057

Other References

https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html

Frequently Asked Questions

What is CVE-2025-39916? +

In the Linux kernel, the following vulnerability has been resolved: mm/damon/reclaim: avoid divide-by-zero in damon_reclaim_apply_parameters() When creating a new scheme of DAMON_RECLAIM, the calculation of 'min_age_region' uses 'aggr_interval' as the divisor, which may lead to division-by-zero errors. Fix it by directly returning -EINVAL when such a case occurs. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2025-39916? +

CVE-2025-39916 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-39916? +

CVE-2025-39916 affects products from debian, linux, specifically: debian_linux, linux_kernel. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-39916? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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