PT-2025-40083 · Linux+4 · Linux Kernel+4

Published 2025-09-03 · Updated 2026-05-07 · CVE-2025-39909

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description The Linux kernel contains a flaw within the DAMON (Data Access MONitor) module’s RECLAIM and LRU SORT components. These modules lack validation of user-configured parameters during application, potentially leading to division-by-zero errors during the calculation of hot thres and cold thres when either sample interval or aggr interval is used as a divisor. The issue is addressed by adding validation checks to prevent the division-by-zero error and returning -EINVAL when it occurs.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Divide By Zero

Weakness Enumeration

CWE-369

Related Identifiers

AZL-68013

BDU:2026-02683

CVE-2025-39909

DLA-4328-1

ECHO-0208-E70B-3541

MGASA-2025-0309

MGASA-2025-0310

OPENSUSE-SU-2025:20081-1

SUSE-SU-2025:21074-1

SUSE-SU-2025:21139-1

SUSE-SU-2025:21179-1

USN-8095-1

USN-8095-2

USN-8095-3

USN-8095-4

USN-8095-5

USN-8100-1

USN-8125-1

USN-8126-1

USN-8165-1

USN-8261-1

Affected Products

Astra Linux

Linuxmint

Linux Kernel

Suse

Ubuntu

References · 2684

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/39xxx/CVE-2025-39909.json · Exploit
• https://ubuntu.com/security/CVE-2025-38055 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-40092 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-21833 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-39788 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-38251 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-38543 · Vendor Advisory
• https://advisories.mageia.org/MGASA-2025-0309.html · Security Note
• https://ubuntu.com/security/CVE-2025-40284 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-40307 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-37844 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-68264 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-38677 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-38699 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-23207 · Vendor Advisory