CVE-2025-68191

udp_tunnel: use netdev_warn() instead of netdev_WARN()

EPSS 0.2%

Vexday Risk Score

3Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS —EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

16 Dec 2025Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

In the Linux kernel, the following vulnerability has been resolved: udp_tunnel: use netdev_warn() instead of netdev_WARN() netdev_WARN() uses WARN/WARN_ON to print a backtrace along with file and line information. In this case, udp_tunnel_nic_register() returning an error is just a failed operation, not a kernel bug. udp_tunnel_nic_register() can fail due to a memory allocation failure (kzalloc() or udp_tunnel_nic_alloc()). This is a normal runtime error and not a kernel bug. Replace netdev_WARN() with netdev_warn() accordingly.

Affected products

Linux · Linux

References

https://git.kernel.org/stable/c/087f1ed450dc6e7e49ffbbbe5b78be1218c6d5e0 https://git.kernel.org/stable/c/3c3b148bf8384c8a787753cf20abde1c5731f97f https://git.kernel.org/stable/c/45e4e4a8772fa1c5f6f38e82b732b3a9d8137af4 https://git.kernel.org/stable/c/51b3033088f0420b19027e3d54cd989b6ebd987e https://git.kernel.org/stable/c/7758ec35ff3e9a31558eda4f0f9eb0ddfa78a8ba https://git.kernel.org/stable/c/c018a87942bf1607aeebf8dba5a210ca9a09a0fd https://git.kernel.org/stable/c/dc2f650f7e6857bf384069c1a56b2937a1ee370d