CVE-2026-23665: CWE-122: Heap-based Buffer Overflow in Microsoft Azure Linux Virtual Machines with Azure Diagnostics extension
Heap-based buffer overflow in Azure Linux Virtual Machines allows an authorized attacker to elevate privileges locally.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-23665) involves a heap-based buffer overflow in the Azure Diagnostics extension on Azure Linux Virtual Machines. An attacker with local authorized access can exploit this flaw to gain elevated privileges, potentially compromising system integrity. The vulnerability is classified under CWE-122 and has a CVSS 3.1 base score of 7.8, indicating high impact on confidentiality, integrity, and availability. Microsoft has released a patch to remediate this issue.
Potential Impact
Successful exploitation allows an authorized local attacker to elevate privileges, which can lead to full system compromise including unauthorized access to sensitive data and disruption of system operations. The high CVSS score reflects significant impact on confidentiality, integrity, and availability.
Mitigation Recommendations
A patch is available from Microsoft to fix this vulnerability. It is recommended to apply the official update to the Azure Diagnostics extension on affected Azure Linux Virtual Machines promptly. Since this is not a cloud service vulnerability but affects the extension on virtual machines, administrators must update the extension manually or via their management processes.
CVE-2026-23665: CWE-122: Heap-based Buffer Overflow in Microsoft Azure Linux Virtual Machines with Azure Diagnostics extension
Description
Heap-based buffer overflow in Azure Linux Virtual Machines allows an authorized attacker to elevate privileges locally.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-23665) involves a heap-based buffer overflow in the Azure Diagnostics extension on Azure Linux Virtual Machines. An attacker with local authorized access can exploit this flaw to gain elevated privileges, potentially compromising system integrity. The vulnerability is classified under CWE-122 and has a CVSS 3.1 base score of 7.8, indicating high impact on confidentiality, integrity, and availability. Microsoft has released a patch to remediate this issue.
Potential Impact
Successful exploitation allows an authorized local attacker to elevate privileges, which can lead to full system compromise including unauthorized access to sensitive data and disruption of system operations. The high CVSS score reflects significant impact on confidentiality, integrity, and availability.
Mitigation Recommendations
A patch is available from Microsoft to fix this vulnerability. It is recommended to apply the official update to the Azure Diagnostics extension on affected Azure Linux Virtual Machines promptly. Since this is not a cloud service vulnerability but affects the extension on virtual machines, administrators must update the extension manually or via their management processes.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-01-14T16:59:33.464Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 69b05628ea502d3aa87d68b2
Added to database: 3/10/2026, 5:34:32 PM
Last enriched: 4/18/2026, 2:10:02 PM
Last updated: 4/28/2026, 7:21:26 AM
Views: 55
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