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Ubuntu Security NoticesUSN-8656-1

USN-8656-1: Linux kernel (HWE) vulnerabilities

Severity not listed 21 CVEs Published Aug 20, 2026 at 9:21 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:

  • x86 architecture
  • InfiniBand drivers
  • Network drivers
  • Mellanox network drivers
  • File systems infrastructure
  • IPv4 networking
  • Network traffic control
  • TCP network protocol
  • B.A.T.M.A.N. meshing protocol
  • IPv6 networking
  • Multipath TCP
  • Netfilter
  • Open vSwitch
  • RxRPC session sockets
  • SCTP protocol
  • SMC sockets; (CVE-2026-43083, CVE-2026-43197, CVE-2026-43198, CVE-2026-43465, CVE-2026-46242, CVE-2026-46325, CVE-2026-46331, CVE-2026-52914, CVE-2026-52924, CVE-2026-52931, CVE-2026-53151, CVE-2026-53176, CVE-2026-53212, CVE-2026-53215, CVE-2026-53224, CVE-2026-53225, CVE-2026-53228, CVE-2026-53246, CVE-2026-53247, CVE-2026-53359, CVE-2026-64531)

Products covered

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

Remediation

This update corrects flaws in the following subsystems:

  • x86 architecture
  • InfiniBand drivers
  • Network drivers
  • Mellanox network drivers
  • File systems infrastructure
  • IPv4 networking
  • Network traffic control
  • TCP network protocol
  • B.A.T.M.A.N.

CVEs in this advisory 21

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.