PT-2026-5512 · Linux+3 · Linux Kernel+3

Published 2025-01-01 · Updated 2026-05-22 · CVE-2025-71186

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 A device leak exists in the dmaengine subsystem, specifically within the stm32 dmamux component, during route allocation. The issue stems from failing to release a reference to the DMA mux platform device when looking up the device during route allocation. Holding a reference to a device does not prevent its driver data from being removed, making the reference unnecessary.

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

Exploit

Allocation of Resources Without Limits

Memory Leak

Weakness Enumeration

CWE-770

CWE-401

Related Identifiers

BDU:2026-04101

CVE-2025-71186

ECHO-B99E-9A29-D77A

OESA-2026-1566

OESA-2026-1567

OESA-2026-1570

OPENSUSE-SU-2026:20416-1

SUSE-SU-2026:20838-1

SUSE-SU-2026:20931-1

SUSE-SU-2026:21284-1

USN-8162-1

USN-8180-1

USN-8180-2

USN-8180-3

USN-8180-4

USN-8180-5

USN-8180-6

USN-8186-1

USN-8187-1

USN-8188-1

USN-8243-1

USN-8275-1

USN-8278-1

USN-8289-1

USN-8296-1

USN-8297-1

Affected Products

Linuxmint

Linux Kernel

Ubuntu

Stm32 Dmamux

References · 1064

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/71xxx/CVE-2025-71186.json · Exploit
• https://ubuntu.com/security/CVE-2026-23083 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-40223 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-71137 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-40055 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-39764 · Security Note
• https://ubuntu.com/security/CVE-2025-68813 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-23148 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-40030 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-23123 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-71235 · Security Note
• https://ubuntu.com/security/CVE-2025-40149 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-22058 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-39953 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:20838-1 · Vendor Advisory