#VU104695 Improper locking in Linux kernel - CVE-2022-49316

Vulnerability identifier: #VU104695

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-2022-49316

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 _nfs4_open_and_get_state() function in fs/nfs/nfs4proc.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/08d7a26d115cc7892668baa9750f64bd8baca29b
https://git.kernel.org/stable/c/0ee5b9644f06b4d3cdcd9544f43f63312e425a4c
https://git.kernel.org/stable/c/6949493884fe88500de4af182588e071cf1544ee
https://git.kernel.org/stable/c/6b3fc1496e7227cd6a39a80bbfb7588ef7c7a010
https://git.kernel.org/stable/c/a2b3be930e79cc5d9d829f158e31172b2043f0cd
https://git.kernel.org/stable/c/d4c2a041ed3ba114502d5ed6ace5b1a48d637a8e
https://git.kernel.org/stable/c/ea759ae0a9ae5acee677d722129710ac89cc59c1

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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.