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Technical advisory

Exploit Released for Unpatched Ubuntu Linux Flaw Enabling Host-Root Container Escape

Editorial source
Editorial OSINT source. The content is an indication to verify with independent institutional or technical sources before operational decisions.
EudorIA operational summary

What it means

Priority 60/100

Un flaw in Linux kernel (CVE-2026-80521) permette l'escape da container e accesso root sul host. Ubuntu non ha ancora rilasciato patch per 26.04, 24.04 e 22.04 LTS. L'exploit è stato rilasciato da DepthFirst, ma non ci sono segnalazioni di attacchi attivi. La vulnerabilità è in AF_UNIX socket subsystem e sfrutta un race condition nel garbage collector.

Why it matters

Per le PMI italiane, la vulnerabilità rappresenta un rischio elevato per i sistemi containerizzati, potenzialmente esponendo dati sensibili e infrastrutture critiche. L'assenza di patch e la possibilità di escape da container riducono la sicurezza delle applicazioni e dei dati.

Potential operational benefits

  • Riduzione della superficie esposta per attacchi kernel-based
  • Maggiore isolamento dei carichi di lavoro non fidati
  • Miglioramento della sicurezza dei container e del host
  • Riduzione del rischio di escape da container
Indications to confirm against the customer's technical and organisational perimeter.
Relevant controlsPatch managementSegmentazione di reteEDR / XDRFirewall NGFW / IPSMonitoraggio / SIEM
AudienceITSOCCISO
Information centre

Translation in progress

The Hacker News

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

A use-after-free in the Linux kernel's AF_UNIX socket subsystem can be used to escape a container and gain root on the host, security firm DepthFirst said in research published September 22. The flaw, tracked as CVE-2026-80521 (CVSS score: 7.8), was fixed upstream on August 6, but Ubuntu has not shipped the patch for its 26.04, 24.04, or 22.04 LTS releases. DepthFirst

Source
The Hacker News
Publishing entity
The Hacker News
Entity type
editorial osint
Area
Global
Original language
en · translation in preparation
Publication
23/09/2026 13:12
MITRE ATT&CK
T1486, T1078
CVE
CVE-2026-80521
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