Unrated severityNVD Advisory· Published Dec 16, 2025· Updated Apr 15, 2026
CVE-2025-68191
CVE-2025-68191
Description
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.
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Affected products
3Patches
Vulnerability mechanics
References
7- git.kernel.org/stable/c/087f1ed450dc6e7e49ffbbbe5b78be1218c6d5e0nvd
- git.kernel.org/stable/c/3c3b148bf8384c8a787753cf20abde1c5731f97fnvd
- git.kernel.org/stable/c/45e4e4a8772fa1c5f6f38e82b732b3a9d8137af4nvd
- git.kernel.org/stable/c/51b3033088f0420b19027e3d54cd989b6ebd987envd
- git.kernel.org/stable/c/7758ec35ff3e9a31558eda4f0f9eb0ddfa78a8banvd
- git.kernel.org/stable/c/c018a87942bf1607aeebf8dba5a210ca9a09a0fdnvd
- git.kernel.org/stable/c/dc2f650f7e6857bf384069c1a56b2937a1ee370dnvd
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