#VU67508 Out-of-bounds read in Linux kernel - CVE-2022-39190

Vulnerability identifier: #VU67508

Vulnerability risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-39190

CWE-ID: CWE-125

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 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, 5.19.6

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

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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.