Bug 2452019 (CVE-2026-33542)

Summary: CVE-2026-33542 github.com/lxc/incus: Incus: Image cache poisoning due to insufficient image fingerprint validation
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Incus, a system container and virtual machine manager. A remote attacker could exploit a lack of validation of image fingerprints when downloading from simplestreams image servers. This vulnerability, under specific conditions, could lead to image cache poisoning, allowing an attacker to expose other tenants to running their controlled images instead of the expected ones.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2452041, 2452042    
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Description OSIDB Bzimport 2026-03-26 23:01:55 UTC
Incus is a system container and virtual machine manager. Prior to version 6.23.0, a lack of validation of the image fingerprint when downloading from simplestreams image servers opens the door to image cache poisoning and under very narrow circumstances exposes other tenants to running attacker controlled images rather than the expected one. Version 6.23.0 patches the issue.