#VU117721 Use-after-free in Linux kernel - CVE-2025-40052

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Main Vulnerability Database Vulnerabilities #VU117721

#VU117721 Use-after-free in Linux kernel - CVE-2025-40052

Published: October 28, 2025


Vulnerability identifier: #VU117721
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2025-40052
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability: No public exploit available
Vulnerable software:
Linux kernel
Software vendor:
Linux Foundation

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error within the fill_transform_hdr(), smb2_aead_req_alloc() and crypt_message() functions in fs/smb/client/smb2ops.c. A local user can escalate privileges on the system.


Remediation

Install update from vendor's repository.

External links