Input validation error in Linux kernel - CVE-2023-4515
Published: August 18, 2025 / Updated: August 29, 2025
Vulnerability identifier: #VU114187
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-2023-4515
CWE-ID: CWE-20
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 improper input validation within the ksmbd_smb2_check_message() function in fs/ksmbd/smb2misc.c. A local user can perform a denial of service (DoS) attack.
How to mitigate CVE-2023-4515
Install update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/595679098bdcdbfbba91ebe07a2f7f208df93870
- https://git.kernel.org/stable/c/5aa4fda5aa9c2a5a7bac67b4a12b089ab81fee3c
- https://git.kernel.org/stable/c/c6bef3bc30fd4a175aef846b7d928a6c40d091cd
- https://git.kernel.org/stable/c/ff7236b66d69582f90cf5616e63cfc3dc18142bb
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.4.11