Use-after-free in Linux kernel smb client

1) Use-after-free

EUVDB-ID: #VU90068

Risk: Low

CVSSv3.1: 7.7 [AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-52752

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error within the seq_printf() and spin_unlock() functions in fs/smb/client/cifs_debug.c. A local user can escalate privileges on the system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: All versions

CPE2.3

External links

http://git.kernel.org/stable/c/558817597d5fbd7af31f891b67b0fd20f0d047b7
http://git.kernel.org/stable/c/89929ea46f9cc11ba66d2c64713aa5d5dc723b09
http://git.kernel.org/stable/c/0ab6f842452ce2cae04209d4671ac6289d0aef8a
http://git.kernel.org/stable/c/d328c09ee9f15ee5a26431f5aad7c9239fa85e62

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.