#VU90762 Improper locking in Linux kernel - CVE-2022-48675

Vulnerability identifier: #VU90762

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-2022-48675

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 mmput_async() function in kernel/fork.c, within the mutex_unlock() function in drivers/infiniband/core/umem_odp.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/e8de6cb5755eae7b793d8c00c8696c8667d44a7f
https://git.kernel.org/stable/c/819110054b14d7272b4188db997a3d80f75ab785
https://git.kernel.org/stable/c/83c43fd872e32c8071d5582eb7c40f573a8342f3
https://git.kernel.org/stable/c/85eaeb5058f0f04dffb124c97c86b4f18db0b833

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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.