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Ubuntu Security NoticesUSN-8921-1

USN-8921-1: Linux kernel vulnerabilities

Severity not listed 8 CVEs Published Oct 13, 2026 at 3:09 PM UTC

Summary

Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems:

- S390 architecture;

- IIO ADC drivers;

- Multiple devices driver;

- PCI subsystem;

- VFIO drivers;

- Network file system (NFS) server daemon;

- Overlay file system;

View 8 CVE identifiers

Products covered

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

Remediation

This update corrects flaws in the following subsystems:

  • S390 architecture
  • IIO ADC drivers
  • Multiple devices driver
  • PCI subsystem
  • VFIO drivers
  • Network file system (NFS) server daemon
  • Overlay file system; (CVE-2024-53194, CVE-2024-53214, CVE-2024-56570, CVE-2024-56779, CVE-2024-57849, CVE-2024-57904, CVE-2024-57929, CVE-2025-21664)

CVEs in this advisory 8

Updates

  1. Published by Ubuntu

    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.