Bug 2467507 (CVE-2026-40195)

Summary: CVE-2026-40195 incus: Incus: Denial of Service via malformed backup metadata import
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
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. An authenticated user with access to the storage bucket feature can exploit a missing validation logic in the storage bucket import process. By providing a malicious or malformed `index.yaml` file that omits the configuration block during a backup import, the Incus daemon will crash due to a nil-pointer dereference. Repeated exploitation of this vulnerability can lead to a denial of service, making Incus unavailable.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2476739    
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Description OSIDB Bzimport 2026-05-06 21:02:40 UTC 
Incus is a system container and virtual machine manager. In versions before 7.0.0, missing validation logic in the storage bucket import logic allows an authenticated user with access to the storage bucket feature to cause the Incus daemon to crash. The vulnerability is present in the backup metadata handling logic, where the daemon processes the index.yaml file from an imported archive and accesses members of the parsed backup configuration without first verifying that the configuration object was initialized. A malicious or malformed index.yaml that omits the config block causes a nil-pointer dereference during bucket import operations and terminates the daemon. Repeated use of this issue can be used to keep Incus offline, causing a denial of service. This issue is fixed in version 7.0.0.