#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: 6.6 - 6.6.77

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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
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6.78

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Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?