CVE-2026-41684 Details
Description
Incus is a system container and virtual machine manager. Prior to version 7.0.0, backup.GetInfo() trusts the inline backup/index.yaml config when present and only falls back to parsing the legacy backup/container/backup.yaml file if result.Config == nil. As a result, an archive can carry a valid inline config that passes the initial import preflight while also carrying a malformed legacy backup/container/backup.yaml file that is reparsed later from the restored file system. ParseConfigYamlFile() accepts YAML documents with no container section, and multiple downstream consumers then dereference. Container without checking for nil. Confirmed examples in the instance restore and import flow include backup.UpdateInstanceConfig() and internalImportFromBackup(). An authenticated user with permission to import instance backups may be able to crash the Incus daemon with a crafted backup archive whose inline backup/index.yaml is valid but whose extracted legacy backup.yaml omits container. The crash occurs in the restore path after archive extraction has begun. This issue has been patched in version 7.0.0.
A nil pointer dereference vulnerability has been identified in Incus, a system container and virtual machine manager, in versions prior to 7.0.0. The issue arises in the backup restoration process, where the application improperly validates YAML configuration files. Specifically, the inline backup/index.yaml file is trusted without verification, allowing a crafted archive to bypass initial import checks. If the legacy backup/container/backup.yaml file is malformed and lacks a container section, it can lead to a crash of the Incus daemon. This vulnerability can be exploited by an authenticated user with permission to import instance backups, causing a denial of service by crashing the daemon during the restoration process.
Users can update to Incus version 7.0.0 or later, where this vulnerability has been patched.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed May 7, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/lxc/incus/releases/tag/v7.0.0 | [email protected] | PatchProduct |
| https://github.com/lxc/incus/security/advisories/GHSA-x5r6-jr56-89pv | [email protected] | ExploitMitigationVendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-476 | NULL Pointer Dereference | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linuxcontainers incus | < 7.0.0 |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 7, 2026 | Initial Analysis | [email protected] |
| May 7, 2026 | New CVE Received | [email protected] |