CVE-2026-40195
Incus nil-pointer dereference in storage bucket import allows denial of service
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.
INFO
Published Date :
May 6, 2026, 9:16 p.m.
Last Modified :
Oct. 26, 2026, 7:10 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 4.0 | HIGH | [email protected] |
Solution
- Update Incus to version 7.0.0 or later.
- Apply vendor patches if available.
- Validate backup metadata before import.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-40195.
| URL | Resource |
|---|---|
| https://github.com/lxc/incus/security/advisories/GHSA-gc7j-g665-rxr9 | Exploit Vendor Advisory |
| https://github.com/lxc/incus/security/advisories/GHSA-gc7j-g665-rxr9 | Exploit Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-40195 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-40195
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-40195 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-40195 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Translated by [email protected]
Oct. 26, 2026
Action Type Old Value New Value Added Translation Title: incus de lxc, Description: Incus es un gestor de contenedores de sistema y máquinas virtuales. En versiones anteriores a la 7.0.0, la falta de lógica de validación en la lógica de importación de cubos de almacenamiento permite a un usuario autenticado con acceso a la función de cubo de almacenamiento provocar el fallo del demonio de Incus. La vulnerabilidad está presente en la lógica de manejo de metadatos de respaldo, donde el demonio procesa el archivo index.yaml de un archivo importado y accede a miembros de la configuración de respaldo analizada sin verificar primero que el objeto de configuración fue inicializado. Un index.yaml malicioso o malformado que omite el bloque de configuración causa una desreferencia de puntero nulo durante las operaciones de importación de cubos y termina el demonio. El uso repetido de este problema puede utilizarse para mantener Incus fuera de línea, causando una denegación de servicio. Este problema está solucionado en la versión 7.0.0. -
CVE Modified by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'lxc', 'product': 'incus', 'versions': [{'status': 'affected', 'version': '< 7.0.0'}]}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-40195', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-05-07T14:00:09.073926Z'} -
Initial Analysis by [email protected]
May. 07, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Added CPE Configuration OR *cpe:2.3:a:linuxcontainers:incus:*:*:*:*:*:*:*:* versions up to (excluding) 7.0.0 Added Reference Type CISA-ADP: https://github.com/lxc/incus/security/advisories/GHSA-gc7j-g665-rxr9 Types: Exploit, Vendor Advisory Added Reference Type GitHub, Inc.: https://github.com/lxc/incus/security/advisories/GHSA-gc7j-g665-rxr9 Types: Exploit, Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
May. 07, 2026
Action Type Old Value New Value Added Reference https://github.com/lxc/incus/security/advisories/GHSA-gc7j-g665-rxr9 -
New CVE Received by [email protected]
May. 06, 2026
Action Type Old Value New Value Added 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. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-476 Added Reference https://github.com/lxc/incus/security/advisories/GHSA-gc7j-g665-rxr9