#VU103129 Improper locking in Linux kernel - CVE-2025-21662

Vulnerability identifier: #VU103129

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-2025-21662

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 cmd_work_handler() function in drivers/net/ethernet/mellanox/mlx5/core/cmd.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/0e2909c6bec9048f49d0c8e16887c63b50b14647
https://git.kernel.org/stable/c/229cc10284373fbe754e623b7033dca7e7470ec8
https://git.kernel.org/stable/c/36124081f6ffd9dfaad48830bdf106bb82a9457d
https://git.kernel.org/stable/c/f0a2808767ac39f64b1d9a0ff865c255073cf3d4

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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.