NULL pointer dereference in Linux kernel - CVE-2023-53399
Published: September 19, 2025 / Updated: September 22, 2025
Vulnerability identifier: #VU115922
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2023-53399
CWE-ID: CWE-476
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to NULL pointer dereference within the smb2_get_info_filesystem() function in fs/ksmbd/smb2pdu.c. A local user can perform a denial of service (DoS) attack.
How to mitigate CVE-2023-53399
Install update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/1636e09779f83e10e6ed57d91ef94abcefdd206b
- https://git.kernel.org/stable/c/227eb2689b44d0d60da3839b146983e73435924c
- https://git.kernel.org/stable/c/3ac00a2ab69b34189942afa9e862d5170cdcb018
- https://git.kernel.org/stable/c/a70751dd7b60eab025e97e19b6b2477c6eaf2bbb
- https://git.kernel.org/stable/c/b35f6c031b87d9e51f141ff6de0ea59756a8e313
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.2.15