CVE-2026-33743 in lxc incus
Summary
Incus is a system container and virtual machine manager. Prior to version 6.23.0, a specially crafted storage bucket backup can be used by an user with access to Incus' storage bucket feature to crash the Incus daemon. Repeated use of this attack can be used to keep the server offline causing a denial of service of the control plane API. This does not impact any running workload, existing containers and virtual machines will keep operating. Version 6.23.0 fixes the issue.
Responsible
GitHub_M
Reservation
03/23/2026
Disclosure
03/27/2026
Entries
VulDB provides additional information and datapoints for this CVE:
| ID | Vulnerability | CWE | Exp | Cou | CVE |
|---|---|---|---|---|---|
| 353800 | lxc incus Control Plane API allocation of resources | 770 | Not defined | Official fix | CVE-2026-33743 |