Ubuntu still has not released patch for Linux 0day RCE in almost 3 weeks

Canonical has not yet shipped fixed kernels for CVE-2026-98432, a critical vulnerability scored CVSS 9.8, leaving major LTS releases exposed without an official vendor update. Operators running these systems face a prolonged security gap.

• No patched kernels available for Ubuntu 22.04, 24.04, and 26.04 LTS
• The vulnerability carries a critical CVSS score of 9.8
• Ubuntu has not announced an estimated time of arrival (ETA) for fixes

Impact on Internet-Facing Infrastructure

The absence of patches particularly impacts internet-facing and multi-tenant self-hosted environments that rely heavily on Ubuntu LTS kernels for strict process isolation and privilege boundaries. Until official packages land, these hosts remain vulnerable to whatever remote or local exploits the CVE enables.

Interim Mitigations and Administrator Options

Affected system administrators are forced to weigh their options: sticking with the stock kernel while hoping for a swift release, applying out-of-tree mitigations if any exist, or migrating critical workloads to alternative releases or kernels that already include the patch.

Broader Implications for Enterprise Environments

The delay in releasing fixes for a high-severity vulnerability highlights potential bottlenecks in enterprise-grade Linux distribution maintenance, urging system operators to re-evaluate their risk management strategies during zero-day incidents.