Vulnerability · Published May 6, 2026 · Assigned by GitHub_M
CVE-2026-40195Incus nil-pointer dereference in storage bucket import allows denial of service
High 7.1
In plain English
A high-severity null pointer dereference in incus from lxc. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 34% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.24 | incus | 7.0.0-r0 | ALPINE-CVE-2026-40195 |
| Debian:13 | incus | 6.0.4-2+deb13u7 | DEBIAN-CVE-2026-40195 |
| Debian:14 | incus | 7.0.0-1 | DEBIAN-CVE-2026-40195 |
| Go | github.com/lxc/incus | no fix listed | GO-2026-5397 |
| Go | github.com/lxc/incus/v6 | no fix listed | GO-2026-5397 |
| Go | github.com/lxc/incus/v6/cmd/incusd | 7.0.0 | GHSA-gc7j-g665-rxr9 |
| Go | github.com/lxc/incus/v7 | 7.0.0 | GO-2026-5397 |
| Ubuntu:25.10 | incus | no fix listed | UBUNTU-CVE-2026-40195 |
| Ubuntu:26.10 | incus | no fix listed | UBUNTU-CVE-2026-40195 |
Affected products (as reported)
Weakness: CWE-476 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
References
- https://github.com/lxc/incus/security/advisories/GHSA-gc7j-g665-rxr9 x_refsource_CONFIRM