#VU105044 Use of uninitialized resource in Linux kernel - CVE-2025-21716

Vulnerability identifier: #VU105044

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-2025-21716

CWE-ID: CWE-908

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 use of uninitialized resource within the vxlan_vnifilter_dump() function in drivers/net/vxlan/vxlan_vnifilter.c. A local user can perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: 6.12 - 6.12.12

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External links
https://git.kernel.org/stable/c/1693d1fade71646a0731b6b213298cb443d186ea
https://git.kernel.org/stable/c/5066293b9b7046a906eff60e3949a887ae185a43
https://git.kernel.org/stable/c/a84d511165d6ba7f331b90ae6b6ce180ec534daa
https://git.kernel.org/stable/c/cb1de9309a48cc5b771115781eec05075fd67039
https://git.kernel.org/stable/c/f554bce488605d2f70e06eeab5e4d2448c813713
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.12.13

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Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?