#VU90063 Use-after-free in Linux kernel - CVE-2023-52751

Vulnerability identifier: #VU90063

Vulnerability risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-52751

CWE-ID: CWE-416

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 escalate privileges on the system.

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

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: All versions

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External links
http://git.kernel.org/stable/c/6db94d08359c43f2c8fe372811cdee04564a41b9
http://git.kernel.org/stable/c/93877b9afc2994c89362007aac480a7b150f386f
http://git.kernel.org/stable/c/5c86919455c1edec99ebd3338ad213b59271a71b

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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.