Summary
Impact: Elevation of Privilege. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.
Details
What privileges could be gained by an attacker who successfully exploited this vulnerability?
An attacker who successfully exploited this vulnerability could gain SYSTEM privileges.
What actions do customers need to take to protect themselves from this vulnerability?
To protect yourself from this vulnerability, customer must update their Linux Azure Diagnostic extension (LAD) to the latest version by running the following command:
> az extension update --name LinuxDiagnostic
Click here to learn more.
Security updates
2.1.24 — https://learn.microsoft.com/en-us/cli/azure/extension?view=azure-cli-latest#az-extension-update
Vulnerabilities 1
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High 7.8
Linux Azure Diagnostic extension (LAD) Elevation of Privilege Vulnerability
Heap-based buffer overflow in Azure Linux Virtual Machines allows an authorized attacker to elevate privileges locally.
Revision history
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#1
Information published.
References
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CVE-2026-23665 Linux Azure Diagnostic extension (LAD) Elevation of Privilege Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-23665
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Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
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Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
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Common Vulnerability Scoring System
https://www.first.org/cvss