Anza and the Solana Foundation issued an urgent alert on November 1, 2026, advising Solana mainnet-beta validators to mitigate CVE-2026-98432, an unpatched Linux kernel vulnerability

From the articleAnza Sounds the Alarm for Solana Validators on a Linux Bug Ubuntu Hasn't Fixed - UnchainedAlso in Solana validators told to filter traffic over unpatched Linux flaw, Solana validators told to act immediately as critical Linux vulnerability emerges