#VU91518 Improper locking in Linux kernel - CVE-2023-52666

Vulnerability identifier: #VU91518

Vulnerability risk: Low

CVSSv4.0: 4.3 [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-2023-52666

CWE-ID: CWE-667

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

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

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External links
https://git.kernel.org/stable/c/5349fd419e4f685d609c85b781f2b70f0fb14848
https://git.kernel.org/stable/c/e61fc656ceeaec65f19a92f0ffbeb562b7941e8d
https://git.kernel.org/stable/c/e9ec6665de8f706b4f4133b87b2bd02a159ec57b
https://git.kernel.org/stable/c/ecfd93955994ecc2a1308f5ee4bd90c7fca9a8c6
https://git.kernel.org/stable/c/6fc0a265e1b932e5e97a038f99e29400a93baad0

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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.