CVE-2023-21531: Azure Service Fabric Container Elevation of Privilege Vulnerability

Severity: high (CVSS 7.0 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-01-10 · updated 2026-06-17
Weakness: CWE-284

Description

Azure Service Fabric Container Elevation of Privilege Vulnerability

Affected products

Microsoft Azure Service Fabric for Linux: 8.2, 9.0, 9.1
Microsoft Azure Service Fabric 8.2: from 8.2 before 8.2 CU8 — fixed in 8.2 CU8
Microsoft Azure Service Fabric 9.0 for Linux: from 9.0 before 9.0 CU5 — fixed in 9.0 CU5
Microsoft Azure Service Fabric 9.1: from 9.1 before 9.1 CU1 — fixed in 9.1 CU1

How to fix

Upgrade to a fixed version: Microsoft Azure Service Fabric 8.2 8.2 CU8; Microsoft Azure Service Fabric 9.0 for Linux 9.0 CU5; Microsoft Azure Service Fabric 9.1 9.1 CU1. Check the vendor advisory for mitigations.

References

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