#VU90240 Use-after-free in Linux kernel - CVE-2023-52564

Vulnerability identifier: #VU90240

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-2023-52564

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 gsm_cleanup_mux() function in drivers/tty/n_gsm.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
https://git.kernel.org/stable/c/6d5c8862932d31a810b6545f7d69ecc124402c6e
https://git.kernel.org/stable/c/a48d2bcd23f2c98d575bc2f9b7a3fbd16aeea9eb
https://git.kernel.org/stable/c/c61d0b87a7028c2c10faffc524d748334c7b9827
https://git.kernel.org/stable/c/2bff660e0ff349dee84dc4f6f6d10da4497f5b28
https://git.kernel.org/stable/c/29346e217b8ab8a52889b88f00b268278d6b7668

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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.