#VU93768 Improper locking in Linux kernel - CVE-2023-52681

Vulnerability identifier: #VU93768

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-2023-52681

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 efivarfs_init_fs_context() function in fs/efivarfs/super.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/ea6b597fcaca99562fa56a473bcbbbd79b40af03
https://git.kernel.org/stable/c/48be1364dd387e375e1274b76af986cb8747be2c
https://git.kernel.org/stable/c/92be3095c6ca1cdc46237839c6087555be9160e3
https://git.kernel.org/stable/c/547713d502f7b4b8efccd409cff84d731a23853b

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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.