Back to vendor advisories
Ubuntu Security NoticesUSN-8818-2

USN-8818-2: Linux kernel (IBM) vulnerabilities

Severity not listed 20 CVEs Published Sep 25, 2026 at 11:35 AM UTC

Summary

It was discovered that some Arm processors could complete a broadcast translation lookaside buffer (TLB) invalidation before memory writes made through the invalidated translation were globally observed. A local attacker could possibly use this to write to memory after permission to do so had been revoked, bypassing memory protections or escalating privileges. (CVE-2025-10263) 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:

  • ARM64 architecture
  • InfiniBand drivers
  • Network drivers
  • TCM subsystem
  • exFAT file system
  • Network file system (NFS) client
  • Network file system (NFS) server daemon
  • B.A.T.M.A.N. meshing protocol
  • IPv4 networking
  • IPv6 networking
  • Netfilter
  • RDS protocol; (CVE-2026-53186, CVE-2026-53216, CVE-2026-53221, CVE-2026-53354, CVE-2026-53355, CVE-2026-53398, CVE-2026-63800, CVE-2026-63808, CVE-2026-63887, CVE-2026-63888, CVE-2026-63912, CVE-2026-63922, CVE-2026-63924, CVE-2026-63984, CVE-2026-63992, CVE-2026-63993, CVE-2026-63994, CVE-2026-64007, CVE-2026-64091)

Products covered

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

Remediation

This update corrects flaws in the following subsystems:

  • ARM64 architecture
  • InfiniBand drivers
  • Network drivers
  • TCM subsystem
  • exFAT file system
  • Network file system (NFS) client
  • Network file system (NFS) server daemon
  • B.A.T.M.A.N.

CVEs in this advisory 20

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.