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Technical advisory

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

Official source
EudorIA operational summary

What it means

Priority 75/100

Ubuntu ha rilasciato un aggiornamento di sicurezza (USN-8818-2) per il kernel Linux, correggendo diverse vulnerabilità nei sottosistemi come NFS, B.A.T.M.A.N. e architetture ARM64. Le vulnerabilità potrebbero permettere a un attaccante locale di bypassare protezioni di memoria o elevare privilegi. L'aggiornamento richiede un riavvio e la reinstallazione di moduli kernel terzi. La patch è disponibile per Ubuntu Pro.

Why it matters

Le vulnerabilità possono compromettere la sicurezza di sistemi IBM cloud e di dispositivi con architettura ARM64 utilizzati in PMI italiane, mettendo a rischio dati sensibili e operatività aziendale. L'aggiornamento è essenziale per prevenire sfruttamenti non autorizzati.

Recommended actions

  1. Applicare immediatamente l'aggiornamento kernel per Ubuntu Pro
  2. Riavviare i sistemi dopo l'applicazione delle patch
  3. Riconsiderare l'uso di moduli kernel terzi e riconfigurarli
  4. Verificare la presenza di accessi non autorizzati ai sottosistemi vulnerabili
  5. Monitorare i log di sistema per segnali di attività anomale

Potential operational benefits

  • Riduzione della superficie esposta alle vulnerabilità
  • Miglioramento della protezione contro attacchi locali
  • Mantenimento della conformità e della sicurezza operativa
Indications to confirm against the customer's technical and organisational perimeter.
Relevant controlsPatch managementFirewall NGFW / IPSMonitoraggio / SIEMSegmentazione di rete
AudienceITSOC
Information centre

Translation in progress

Ubuntu Security

The official content is available in the original language. The Italian version will be published once automated checks are complete.

Text acquired from the source

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 A local attacker could possibly use this to write to memory after permission to do so had been revoked, bypassing memory protections or escalating privileges.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)

Source
Ubuntu Security Notices
Publishing entity
Ubuntu Security
Entity type
vendor security
Area
Global
Original language
en · translation in preparation
Publication
25/09/2026 13:35
MITRE ATT&CK
T1059
CVE
CVE-2025-10263, 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
Technical scope

Affected products and versions

Verification in progress
Information not yet acquired.

The collector will check NVD and the available official vendor advisories.

Open the original source