#VU96409 Use-after-free in Linux kernel - CVE-2022-48935

Vulnerability identifier: #VU96409

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-2022-48935

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 __nft_release_table() function in net/netfilter/nf_tables_api.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/88c795491bf45a8c08a0f94c9ca4f13722e51013
https://git.kernel.org/stable/c/b05a24cc453e3cd51b0c79e3c583b5d495eba1d6
https://git.kernel.org/stable/c/e51f30826bc5384801df98d76109c94953d1df64
https://git.kernel.org/stable/c/8ffb8ac3448845f65634889b051bd65e4dee484b
https://git.kernel.org/stable/c/b4fcc081e527aa2ce12e956912fc47e251f6bd27
https://git.kernel.org/stable/c/6069da443bf65f513bb507bb21e2f87cfb1ad0b6

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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.