Memory leak in Linux kernel netfilter

1) Memory leak

EUVDB-ID: #VU96401

Risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-48933

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to memory leak within the nf_tables_updobj(), nft_obj_commit_update() and __nf_tables_abort() functions in net/netfilter/nf_tables_api.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

External links

http://git.kernel.org/stable/c/53026346a94c43f35c32b18804041bc483271d87
http://git.kernel.org/stable/c/7e9880e81d3fd6a43c202f205717485290432826
http://git.kernel.org/stable/c/e96e204ee6fa46702f6c94c3c69a09e69e0eac52
http://git.kernel.org/stable/c/34bb90e407e3288f610558beaae54ecaa32b11c4
http://git.kernel.org/stable/c/dad3bdeef45f81a6e90204bcc85360bb76eccec7

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.