SB20251216156 - Improper error handling in Linux kernel ipv4
Published: December 16, 2025
Security Bulletin ID
SB20251216156
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Improper error handling (CVE-ID: CVE-2025-68191)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper error handling within the udp_tunnel_nic_netdevice_event() function in net/ipv4/udp_tunnel_nic.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.
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