CVE-2026-40195

Description

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.

How to fix CVE-2026-40195

To remediate CVE-2026-40195, upgrade the affected package to a fixed version below.

• —upgrade to 6.0.4-2+deb13u7 or later
• —no fix listed
• —no fix listed
• —upgrade to 7.0.0 or later
• —upgrade to 7.0.0 or later

Is CVE-2026-40195 being exploited?

Low — EPSS is 0.4%, meaning exploitation activity has not been observed at scale.

Affected packages (5)

• from 0, < 6.0.4-2+deb13u7
• from 0
• from 0
• from 0, < 7.0.0
• from 0, < 7.0.0

CVSS scores

References (4)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2026-40195
• ADVISORYsecurity-tracker.debian.org/tracker/CVE-2026-40195
• PATCHgithub.com/lxc/incus
• WEBgithub.com/lxc/incus/security/advisories/GHSA-gc7j-g665-rxr9