Linux Kernel EUVD-2026-27791

Upgrade to patched kernel versions: 5.10.252 or later for 5.10.x series, 5.15.202+ for 5.15.x, 6.1.165+ for 6.1.x, 6.6.128+ for 6.6.x, 6.12.75+ for 6.12.x, 6.18.16+ for 6.18.x, 6.19.6+ for 6.19.x, or 7.0+ for mainline. Patch commits available at https://git.kernel.org/stable/ with commit hashes provided in references section. For systems unable to immediately upgrade, disable RDS protocol module as compensating control by blacklisting the rds kernel module (add 'blacklist rds' to /etc/modprobe.d/blacklist.conf and 'blacklist rds_tcp' and 'blacklist rds_rdma' for transport modules). Note this mitigation completely removes RDS functionality, impacting applications dependent on RDS sockets including certain Oracle Database RAC configurations and high-performance computing message passing libraries. Verify no critical applications require RDS before disabling. Alternative mitigation: restrict network access to RDS ports (typically 16385-16390 TCP/UDP) via firewall rules to trusted networks only, reducing remote attack surface while maintaining RDS functionality for legitimate internal traffic.