PT-2025-39133 · Linux+4 · Linux Kernel+4

Published 2025-09-04 · Updated 2026-05-07 · CVE-2025-39876

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 flaw exists in the Linux kernel related to network device drivers. Specifically, the fec enet phy reset after clk enable() function may experience a null pointer dereference (NPD) if of phy find device() returns NULL before dereferencing phy dev.

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

Exploit

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

AZL-67659

AZL-74933

BDU:2025-13894

CVE-2025-39876

DLA-4328-1

DLA-4404-1

ECHO-6199-9CA8-B565

MGASA-2025-0309

MGASA-2025-0310

OPENSUSE-SU-2025:20091-1

SUSE-SU-2025:21040-1

SUSE-SU-2025:21052-1

SUSE-SU-2025:21056-1

SUSE-SU-2025:21064-1

SUSE-SU-2025:21080-1

SUSE-SU-2025:21147-1

SUSE-SU-2025:21180-1

SUSE-SU-2025:4057-1

SUSE-SU-2025:4128-1

SUSE-SU-2025:4132-1

SUSE-SU-2025:4140-1

SUSE-SU-2025:4141-1

SUSE-SU-2025:4189-1

SUSE-SU-2025:4301-1

USN-8033-1

USN-8033-2

USN-8033-3

USN-8033-4

USN-8033-5

USN-8033-6

USN-8033-7

USN-8033-8

USN-8034-1

USN-8034-2

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-8141-1

USN-8163-1

USN-8163-2

USN-8165-1

USN-8243-1

USN-8261-1

Affected Products

Debian

Linuxmint

Linux Kernel

Suse

Ubuntu

References · 2756

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/39xxx/CVE-2025-39876.json · Exploit
• https://ubuntu.com/security/CVE-2025-38055 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2025-39876 · 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-2026-23026 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-40284 · Vendor Advisory
• https://git.kernel.org/stable/c/fe78891f296ac05bf4e5295c9829ef822f3c32e7 · Patch
• https://ubuntu.com/security/CVE-2025-68803 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-40307 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-37844 · Vendor Advisory