Denial of service in Linux kernel netfilter

1) Out-of-bounds read

EUVDB-ID: #VU67508

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-2022-39190

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

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

The vulnerability exists due to an out-of-bounds read error within the net/netfilter/nf_tables_api.c in the Linux kernel. A local user can bind to an already bound chain and crash the kernel.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: before 5.19.6

External links

http://github.com/torvalds/linux/commit/e02f0d3970404bfea385b6edb86f2d936db0ea2b
http://twitter.com/pr0Ln
http://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.19.6
http://lore.kernel.org/all/20220824220330.64283-12-pablo@netfilter.org/

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.