CVE-2025-68191
Unknown
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.
SeverityUnknown
CVSS—
Exploit probability—
Product
Linux
PublishedDec 16, 2025
First seenDec 16, 2025
How to fix
Update
- Linux Linux087f1ed450dc6e7e49ffbbbe5b78be1218c6d5e0, 45e4e4a8772fa1c5f6f38e82b732b3a9d8137af4, 7758ec35ff3e9a31558eda4f0f9eb0ddfa78a8ba, c018a87942bf1607aeebf8dba5a210ca9a09a0fd, 51b3033088f0420b19027e3d54cd989b6ebd987e, 3c3b148bf8384c8a787753cf20abde1c5731f97f, dc2f650f7e6857bf384069c1a56b2937a1ee370d or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | cc4e3835eff474aa274d6e1d18f69d9d296d3b76 ≤ v < 087f1ed450dc6e7e49ffbbbe5b78be1218c6d5e0, cc4e3835eff474aa274d6e1d18f69d9d296d3b76 ≤ v < 45e4e4a8772fa1c5f6f38e82b732b3a9d8137af4, cc4e3835eff474aa274d6e1d18f69d9d296d3b76 ≤ v < 7758ec35ff3e9a31558eda4f0f9eb0ddfa78a8ba, cc4e3835eff474aa274d6e1d18f69d9d296d3b76 ≤ v < c018a87942bf1607aeebf8dba5a210ca9a09a0fd, cc4e3835eff474aa274d6e1d18f69d9d296d3b76 ≤ v < 51b3033088f0420b19027e3d54cd989b6ebd987e, cc4e3835eff474aa274d6e1d18f69d9d296d3b76 ≤ v < 3c3b148bf8384c8a787753cf20abde1c5731f97f, cc4e3835eff474aa274d6e1d18f69d9d296d3b76 ≤ v < dc2f650f7e6857bf384069c1a56b2937a1ee370d, 5.9 | 087f1ed450dc6e7e49ffbbbe5b78be1218c6d5e0, 45e4e4a8772fa1c5f6f38e82b732b3a9d8137af4, 7758ec35ff3e9a31558eda4f0f9eb0ddfa78a8ba, c018a87942bf1607aeebf8dba5a210ca9a09a0fd, 51b3033088f0420b19027e3d54cd989b6ebd987e, 3c3b148bf8384c8a787753cf20abde1c5731f97f, dc2f650f7e6857bf384069c1a56b2937a1ee370d |
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