#VU104702 Improper locking in Linux kernel - CVE-2022-49092

Vulnerability identifier: #VU104702

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-2022-49092

CWE-ID: CWE-667

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 (DoS) attack.

The vulnerability exists due to improper locking within the fib_nh_match() function in net/ipv4/fib_semantics.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

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External links
https://git.kernel.org/stable/c/63ea57478aaa3e06a597081a0f537318fc04e49f
https://git.kernel.org/stable/c/6bf92d70e690b7ff12b24f4bfff5e5434d019b82
https://git.kernel.org/stable/c/907c97986d6fa77318d17659dd76c94b65dd27c5
https://git.kernel.org/stable/c/dcd689f9e2640c992f94eae9955b106f71c6825d
https://git.kernel.org/stable/c/f5064531c23ad646da7be8b938292b00a7e61438
https://git.kernel.org/stable/c/f8db5743d09523c0bb35f16e13691e3b7eb5dba0

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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.