#VU105019 Improper locking in Linux kernel - CVE-2025-21749

Vulnerability identifier: #VU105019

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-2025-21749

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 rose_bind() function in net/rose/af_rose.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/4c04b0ab3a647e76d0e752b013de8e404abafc63
https://git.kernel.org/stable/c/667f61b3498df751c8b3f0be1637e7226cbe3ed0
https://git.kernel.org/stable/c/970cd2ed26cdab2b0f15b6d90d7eaa36538244a5
https://git.kernel.org/stable/c/a1300691aed9ee852b0a9192e29e2bdc2411a7e6
https://git.kernel.org/stable/c/e0384efd45f615603e6869205b72040c209e69cc

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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.