#VU105151 Input validation error in Linux kernel - CVE-2025-21808

Vulnerability identifier: #VU105151

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-2025-21808

CWE-ID: CWE-20

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 input validation within the dev_xdp_attach() function in net/core/dev.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 - 6.6.75

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External links
https://git.kernel.org/stable/c/3595599fa8360bb3c7afa7ee50c810b4a64106ea
https://git.kernel.org/stable/c/557707906dd3e34b8a8c265f664d19f95799937e
https://git.kernel.org/stable/c/5a9eae683d6c36e8a7aa31e5eb8b369e41aa66e1
https://git.kernel.org/stable/c/b1bc4a35a04cbeb85b6ef5911ec015baa424989f
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6.76

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Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?