#VU105143 Improper locking in Linux kernel - CVE-2025-21801

Vulnerability identifier: #VU105143

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-2025-21801

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 ravb_suspend() and ravb_resume() functions in drivers/net/ethernet/renesas/ravb_main.c. A local user can perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: 6.13 - 6.13.1

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External links
https://git.kernel.org/stable/c/0296981941cf291edfbc318d3255a93439f368e4
https://git.kernel.org/stable/c/2c2ebb2b49573e5f8726112ad06b1dffc3c9ea03
https://git.kernel.org/stable/c/ad19522c007bb24ed874468f8baa1503c4662cf4
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.13.2

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Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?