Improper locking in Linux kernel hw mlx5 driver



| Updated: 2025-05-11
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2025-21892
CWE-ID CWE-667
Exploitation vector Local
Public exploit N/A
Vulnerable software
 Linux kernel
Operating systems & Components / Operating system

Vendor Linux Foundation

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Improper locking

EUVDB-ID: #VU106121

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-2025-21892

CWE-ID: CWE-667 - Improper Locking

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to improper locking within the mlx5r_umr_cleanup(), mlx5r_umr_recover() and mlx5r_umr_post_send_wait() functions in drivers/infiniband/hw/mlx5/umr.c. A local user can perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 6.12 - 6.13.5

CPE2.3 External links

https://git.kernel.org/stable/c/1d2b84d8d054313deed2b2fcafe1168bbcb9e99f
https://git.kernel.org/stable/c/3e3bf255992cc02404e9d209b127c1c9944239cf
https://git.kernel.org/stable/c/d97505baea64d93538b16baf14ce7b8c1fbad746
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.12.18
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.13.6
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.14


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.



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