CVE-2026-33743

Incus vulnerable to denial of source through crafted bucket backup file

State: Published
Severity: 6.5 Medium
Published: Mar 26, 2026
Updated: Mar 27, 2026
Reserved: Mar 23, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	6.5 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H	GitHub_M

Weaknesses

CWE-770 Allocation of Resources Without Limits or Throttling

Affected Products

Product	Versions
incuslxc	< 6.23.0Affected

References

https://github.com/lxc/incus/security/advisories/GHSA-vg76-xmhg-j5x3

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