PT-2025-44123 · Linux+3 · Linux Kernel+3

Published 2025-09-23 · Updated 2026-05-26 · CVE-2025-40055

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 within the ocfs2 component related to a double free in the user cluster connect() function. Specifically, user cluster disconnect() frees a memory region, and the error handling path subsequently frees the same memory region again. This is addressed by setting the pointer to NULL after the initial free, preventing the double free condition.

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

Exploit

Double Free

Weakness Enumeration

CWE-415

Related Identifiers

BDU:2025-13642

CVE-2025-40055

DLA-4379-1

DLA-4404-1

DSA-6053-1

ECHO-46E0-A48F-B4CE

MGASA-2025-0309

MGASA-2025-0310

OESA-2025-2765

OESA-2025-2766

OESA-2025-2767

OPENSUSE-SU-2025:15702-1

OPENSUSE-SU-2025:20172-1

OPENSUSE-SU-2026:10301-1

SUSE-SU-2025:4393-1

SUSE-SU-2025:4422-1

SUSE-SU-2025:4505-1

SUSE-SU-2025:4515-1

SUSE-SU-2025:4516-1

SUSE-SU-2025:4517-1

SUSE-SU-2025:4521-1

SUSE-SU-2026:20012-1

SUSE-SU-2026:20015-1

SUSE-SU-2026:20021-1

SUSE-SU-2026:20039-1

SUSE-SU-2026:20059-1

SUSE-SU-2026:20473-1

SUSE-SU-2026:20496-1

USN-8029-1

USN-8029-2

USN-8029-3

USN-8030-1

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-8048-1

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-8141-1

USN-8163-1

USN-8163-2

USN-8165-1

USN-8243-1

USN-8261-1

Affected Products

Debian

Linuxmint

Linux Kernel

Ubuntu

References · 2300

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/40xxx/CVE-2025-40055.json · Exploit
• https://ubuntu.com/security/CVE-2025-40333 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-40123 · Security Note
• https://ubuntu.com/security/CVE-2025-68222 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-38396 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-38349 · Security Note
• https://ubuntu.com/security/CVE-2025-38576 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-41014 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-39734 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-22128 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-68183 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-23157 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-71071 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-68724 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-68332 · Vendor Advisory