CVE-2025-39916

mm/damon/reclaim: avoid divide-by-zero in damon_reclaim_apply_parameters()

MEDIUM

5.5

CVSS Score

Published: October 1, 2025 at 07:44 AM UTC

Updated: October 19, 2026 at 09:10 PM UTC

2 products affected across 2 vendorsLinux KernelDebian Linux

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Severity

MEDIUM5.5

Exploit prediction

EPSS 0.1%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Debian Linux · Debiandrupal

95%

11.0

Linux Kernel · Linux

95%

6.0.12 ≤ v < 6.1.1536.13 ≤ v < 6.16.86.2 ≤ v < 6.6.1076.7 ≤ v < 6.12.486.0.12 6.1 6.17 6.17 rc1 6.17 rc2 6.17 rc3 6.17 rc4 6.17 rc5f5a79d7c0c87c8d88bb5e3f3c898258fdf1b3b05fd3e613a912bbb344ee18579cc2ad3329aacba41

Vendor states this is fixed in 40cb9b38b645126fdd1d6aa3d6811a8ad50ddfa1 (fixed)

Vendor states this is fixed in 5d6eeb3c683c777ed4538eb3a650bb7da17a7cff (fixed)

Vendor states this is fixed in 64dc351e58271c1e9005e42f5216b4f3d7a39b66 (fixed)

Vendor states this is fixed in 9fe0415156fbde773b31f920201cb70b1f0e40fe (fixed)

Vendor states this is fixed in e6b543ca9806d7bced863f43020e016ee996c057 (fixed)

Vendor states this is fixed in 6.1 (unaffected)

Vendor states this is fixed in 6.1.153 (unaffected)

Vendor states this is fixed in 6.12.48 (unaffected)

Vendor states this is fixed in 6.16.8 (unaffected)

Vendor states this is fixed in 6.17 (unaffected)

Vendor states this is fixed in 6.6.107 (unaffected)