#VU104991 NULL pointer dereference in Linux kernel - CVE-2025-21790
Vulnerability identifier: #VU104991
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-2025-21790
CWE-ID:
CWE-476
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 NULL pointer dereference within the vxlan_init() function in drivers/net/vxlan/vxlan_core.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, 6.12.1, 6.12.2, 6.12.3, 6.12.4, 6.12.5, 6.12.6, 6.12.7, 6.12.8, 6.12.9, 6.12.10, 6.12.11, 6.12.12, 6.12.13, 6.12.14, 6.12.15
External links
https://git.kernel.org/stable/c/3215f5aafc49aaa993991633833854694e73b439
https://git.kernel.org/stable/c/5805402dcc56241987bca674a1b4da79a249bab7
https://git.kernel.org/stable/c/79aea5e55156c87dc570e43fcd8bba01b9d6ab3f
https://git.kernel.org/stable/c/a303649b99b64858d62ce7428125d8e71675d2b6
https://git.kernel.org/stable/c/e860f847787fbbf0d8dacd638c019c7c3d4a9bd3
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.12.16
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.
