PT-2025-46752 · Linux+3 · Linux Kernel+3

Published 2025-09-29 · Updated 2026-05-26 · CVE-2025-40195

Positive Technologies (AI Summary)

CVSS v2.0

4.6

Medium

Base vector

AV:L/AC:L/Au:S/C:N/I:N/A:C

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

Description The Linux kernel contains a flaw in the mnt ns release() function. Specifically, a NULL pointer may be passed to this function when called from listmount(). This can lead to issues when handling the namespace release.

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-70076

BDU:2025-14577

CVE-2025-40195

ECHO-7548-6D5B-A379

OPENSUSE-SU-2026:20287-1

SUSE-SU-2026:20555-1

SUSE-SU-2026:20599-1

SUSE-SU-2026:20615-1

USN-8029-1

USN-8029-2

USN-8029-3

USN-8030-1

USN-8048-1

Affected Products

Debian

Linuxmint

Linux Kernel

Ubuntu

References · 851

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/40xxx/CVE-2025-40195.json · Exploit
• https://ubuntu.com/security/CVE-2025-40333 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-40294 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-40106 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-40341 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-68183 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:20615-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-40285 · Vendor Advisory
• https://bdu.fstec.ru/vul/2025-14577 · Security Note
• https://ubuntu.com/security/CVE-2025-40119 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-40046 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-40102 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-8029-3 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-40049 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-68180 · Vendor Advisory