Linux Kernel up to 6.1.152/6.6.106/6.12.47/6.16.7 DAMON damon_lru_sort_apply_parameters divide by zero

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5.5$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in Linux Kernel up to 6.1.152/6.6.106/6.12.47/6.16.7. This affects the function damon_lru_sort_apply_parameters of the component DAMON Module. Executing a manipulation can lead to divide by zero. This vulnerability appears as CVE-2025-39909. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Linux Kernel up to 6.1.152/6.6.106/6.12.47/6.16.7 and classified as critical. This vulnerability affects the function damon_lru_sort_apply_parameters of the component DAMON Module. The manipulation with an unknown input leads to a divide by zero vulnerability. The CWE definition for the vulnerability is CWE-369. The product divides a value by zero. As an impact it is known to affect availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: mm/damon/lru_sort: avoid divide-by-zero in damon_lru_sort_apply_parameters() Patch series "mm/damon: avoid divide-by-zero in DAMON module's parameters application". DAMON's RECLAIM and LRU_SORT modules perform no validation on user-configured parameters during application, which may lead to division-by-zero errors. Avoid the divide-by-zero by adding validation checks when DAMON modules attempt to apply the parameters. This patch (of 2): During the calculation of 'hot_thres' and 'cold_thres', either 'sample_interval' or 'aggr_interval' is used as the divisor, which may lead to division-by-zero errors. Fix it by directly returning -EINVAL when such a case occurs. Additionally, since 'aggr_interval' is already required to be set no smaller than 'sample_interval' in damon_set_attrs(), only the case where 'sample_interval' is zero needs to be checked.

The advisory is shared for download at git.kernel.org. This vulnerability was named CVE-2025-39909 since 04/16/2025. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 269662 (Linux Distros Unpatched Vulnerability : CVE-2025-39909), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.1.153, 6.6.107, 6.12.48 or 6.16.8 eliminates this vulnerability. Applying the patch 74e391f7da7d9d5235a3cca88ee9fc18f720c75b/7bb675c9f0257840d33e5d1337d7e3afdd74a6bf/af0ae62b935317bed1a1361c8c9579db9d300e70/326a4b3750c71af3f3c52399ec4dbe33b6da4c26/711f19dfd783ffb37ca4324388b9c4cb87e71363 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (269662) and CERT Bund (WID-SEC-2025-2170). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

  • Debian Linux
  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • SUSE openSUSE
  • RESF Rocky Linux
  • Open Source Linux Kernel
  • Dell Secure Connect Gateway

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.6
VulDB Meta Temp Score: 5.5

VulDB Base Score: 5.7
VulDB Temp Score: 5.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Divide by zero
CWE: CWE-369 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 269662
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2025-39909

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.1.153/6.6.107/6.12.48/6.16.8
Patch: 74e391f7da7d9d5235a3cca88ee9fc18f720c75b/7bb675c9f0257840d33e5d1337d7e3afdd74a6bf/af0ae62b935317bed1a1361c8c9579db9d300e70/326a4b3750c71af3f3c52399ec4dbe33b6da4c26/711f19dfd783ffb37ca4324388b9c4cb87e71363

Timelineinfo

04/16/2025 CVE reserved
10/01/2025 +168 days Advisory disclosed
10/01/2025 +0 days VulDB entry created
01/16/2026 +107 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2025-39909 (🔒)
GCVE (CVE): GCVE-0-2025-39909
GCVE (VulDB): GCVE-100-326488
CERT Bund: WID-SEC-2025-2170 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 10/01/2025 10:24
Updated: 01/16/2026 20:57
Changes: 10/01/2025 10:24 (59), 10/01/2025 19:27 (7), 10/11/2025 07:42 (2), 11/25/2025 04:26 (1), 12/01/2025 17:45 (1), 01/07/2026 10:20 (1), 01/16/2026 20:57 (10)
Complete: 🔍
Cache ID: 216::103

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