#VU106162 Use-after-free in Linux kernel - CVE-2023-53023

Vulnerability identifier: #VU106162

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-2023-53023

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 local_cleanup() function in net/nfc/llcp_core.c. A local user can escalate privileges on the system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: 6.1, 6.1 rc1, 6.1 rc3, 6.1 rc7, 6.1.1, 6.1.2, 6.1.3, 6.1.4, 6.1.5, 6.1.6, 6.1.7, 6.1.8

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External links
https://git.kernel.org/stable/c/4bb4db7f3187c6e3de6b229ffc87cdb30a2d22b6
https://git.kernel.org/stable/c/54f7be61584b8ec4c6df405f479495b9397bae4a
https://git.kernel.org/stable/c/7f129927feaf7c10b1c38bbce630172e9a08c834
https://git.kernel.org/stable/c/a59cdbda3714e11aa3ab579132864c4c8c6d54f9
https://git.kernel.org/stable/c/ad1baab3a5c03692d22ce446f38596a126377f6a
https://git.kernel.org/stable/c/b09ae26f08aaf2d85f96ea7f90ddd3387f62216f
https://git.kernel.org/stable/c/d3605282ec3502ec8847915eb2cf1f340493ff79
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.9

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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.