#VU106118 Improper locking in Linux kernel - CVE-2025-21885

Vulnerability identifier: #VU106118

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-2025-21885

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 bnxt_re_create_srq() function in drivers/infiniband/hw/bnxt_re/ib_verbs.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/2cf8e6b52aecb8fbb71c41fe5add3212814031a2
https://git.kernel.org/stable/c/722c3db62bf60cd23acbdc8c4f445bfedae4498e
https://git.kernel.org/stable/c/b66535356a4834a234f99e16a97eb51f2c6c5a7d

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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.