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Ubuntu Security NoticesUSN-8662-2

USN-8662-2: Linux kernel (FIPS) vulnerabilities

Severity not listed 16 CVEs Published Aug 21, 2026 at 7:23 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
  • Cryptographic API
  • InfiniBand drivers
  • Media drivers
  • STMicroelectronics network drivers
  • Network drivers
  • Ext4 file system
  • IPv4 networking
  • TCP network protocol
  • Locking primitives
  • Ceph Core library
  • IPv6 networking
  • Multipath TCP
  • Netfilter
  • SCTP protocol
  • SMC sockets; (CVE-2026-31405, CVE-2026-31414, CVE-2026-31448, CVE-2026-31649, CVE-2026-43198, CVE-2026-43493, CVE-2026-43499, CVE-2026-46266, CVE-2026-52955, CVE-2026-52982, CVE-2026-52986, CVE-2026-53006, CVE-2026-53176, CVE-2026-53225, CVE-2026-53228, CVE-2026-53359)

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
  • Cryptographic API
  • InfiniBand drivers
  • Media drivers
  • STMicroelectronics network drivers
  • Network drivers
  • Ext4 file system
  • IPv4 networking
  • TCP network protocol
  • Locking primitives
  • Ceph Core library
  • IPv6 networking
  • Multipath TCP
  • Netfilter
  • SCTP protocol
  • SMC sockets; (CVE-2026-31405, CVE-2026-31414, CVE-2026-31448, CVE-2026-31649, CVE-2026-43198, CVE-2026-43493, CVE-2026-43499, CVE-2026-46266, CVE-2026-52955, CVE-2026-52982, CVE-2026-52986, CVE-2026-53006, CVE-2026-53176, CVE-2026-53225, CVE-2026-53228, CVE-2026-53359)

CVEs in this advisory 16

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.