Input validation error in Linux kernel - CVE-2023-32249
Published: August 18, 2025 / Updated: August 29, 2025
Vulnerability identifier: #VU114186
CSH Severity: Low
CVSS v4: 6.8 [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]
CVE-ID: CVE-2023-32249
CWE-ID: CWE-20
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper input validation within the ntlm_authenticate() and smb2_sess_setup() functions in fs/ksmbd/smb2pdu.c. A local user can perform a denial of service (DoS) attack.
Affected software
Linux kernel
How to mitigate CVE-2023-32249
Install update from vendor's repository.
Linux kernel - update to 5.15.112
External References
- https://git.kernel.org/stable/c/088131b7b01099720a528a72005ff17868705d40
- https://git.kernel.org/stable/c/1f0490586544455e5be698be2e6c30077b4ec461
- https://git.kernel.org/stable/c/3353ab2df5f68dab7da8d5ebb427a2d265a1f2b2
- https://git.kernel.org/stable/c/4a98e859c4673013385a54084e0cd865695ca072
- https://git.kernel.org/stable/c/ed76d3a8910be06cd4e4ba63bf6075bf903945a1
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.112