Improper locking in Linux kernel ksmbd

1) Improper locking

EUVDB-ID: #VU91518

Risk: Low

CVSSv3.1: 4.8 [AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-52666

CWE-ID: CWE-667 - Improper Locking

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to improper locking within the smb2_set_ea(), smb2_open() and smb2_set_info_file() functions in fs/ksmbd/smb2pdu.c. A local user can perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: All versions

External links

http://git.kernel.org/stable/c/5349fd419e4f685d609c85b781f2b70f0fb14848
http://git.kernel.org/stable/c/e61fc656ceeaec65f19a92f0ffbeb562b7941e8d
http://git.kernel.org/stable/c/e9ec6665de8f706b4f4133b87b2bd02a159ec57b
http://git.kernel.org/stable/c/ecfd93955994ecc2a1308f5ee4bd90c7fca9a8c6
http://git.kernel.org/stable/c/6fc0a265e1b932e5e97a038f99e29400a93baad0

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.