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AWS Security BulletinsCVE-2026-98432

CVE-2026-98432 - Linux kernel IPv4 TCP use-after-free Issue

Severity not listed 1 CVE Published Oct 31, 2026 at 5:21 AM UTC

Summary

Bulletin ID: 2026-160-AWS

Publication Date: 10/30/2026 22:15 PM PDT

Description:

AWS is aware of CVE-2026-98432, a memory issue in the Linux kernel IPv4 TCP handshake path affecting kernel versions 4.4 and later that could result in remote code execution. Updated kernel packages are available for Amazon Linux 2 and Amazon Linux 2023, and we recommend customers running self-managed Linux instances update and reboot. AWS is applying updates to managed services and no customer action is required for those services.

For full details and per-service guidance, see the complete bulletin at https://aws.amazon.com/security/security-bulletins/2026-160-aws/

Please refer to the article below for the most up-to-date and complete information related to this AWS Security Bulletin.

Products covered

A separate affected-products list was not included in the collected bulletin.

Remediation

Updated kernel packages are available for Amazon Linux 2 and Amazon Linux 2023, and we recommend customers running self-managed Linux instances update and reboot.

CVEs in this advisory 1

Updates

  1. Published by AWS

    The publication date reported by the vendor.

  2. Added to SecurityAlert

    We collected the advisory from the official source.

  3. Confirmed at the source

    Our collector saw this advisory during a later source check.