#VU103588 Improper locking in Linux kernel - CVE-2025-21674

Vulnerability identifier: #VU103588

Vulnerability risk: Low

CVSSv4.0: 1.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:U/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2025-21674

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 mlx5e_xfrm_add_state() and mlx5e_xfrm_del_state() functions in drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec.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/2c3688090f8a1f085230aa839cc63e4a7b977df0
https://git.kernel.org/stable/c/6d3d69c070d920fbb146d73dd3899a50f25d0901
https://git.kernel.org/stable/c/87c4417a902151cfe4363166245a3671a08c256c

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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.