#VU79479 Use-after-free in Linux kernel - CVE-2023-3863

Vulnerability identifier: #VU79479

Vulnerability risk: Low

CVSSv4.0: 5.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-3863

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 nfc_llcp_find_local() function in net/nfc/llcp_core.c in NFC implementation in Linux kernel. A local user can execute arbitrary code with elevated privileges.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Linux kernel: All versions

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External links
https://access.redhat.com/security/cve/CVE-2023-3863
https://github.com/torvalds/linux/commit/6709d4b7bc2e079241fdef15d1160581c5261c10
https://bugzilla.redhat.com/show_bug.cgi?id=2225126

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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.