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Vulnerability record · CVE-2025-39916 · published 1 October 2025

CVE-2025-39916: Linux kernel divide by zero vulnerability

Linux · Linux Kernel

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.

5.5 CVSS 3.1 Medium EPSS 0.15% · top 96.8% CWE-369 · Divide by zero
5.5CVSS 3.1 base score
0.15%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
6References
17 Jun 2026Last modified by NVD

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.

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

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/40cb9b38b645126fdd1d6aa3d6811a8ad50ddfa1 Patch
https://git.kernel.org/stable/c/5d6eeb3c683c777ed4538eb3a650bb7da17a7cff Patch
https://git.kernel.org/stable/c/64dc351e58271c1e9005e42f5216b4f3d7a39b66 Patch
https://git.kernel.org/stable/c/9fe0415156fbde773b31f920201cb70b1f0e40fe Patch
https://git.kernel.org/stable/c/e6b543ca9806d7bced863f43020e016ee996c057 Patch
https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html Mailing ListThird Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2025-39916), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.