What is CVE-2026-33743?

CVE-2026-33743 is a medium-severity vulnerability in Linuxcontainers Incus, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 6.5/10. Published 2026-03-26.

How severe is CVE-2026-33743?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Resource exhaustion in Linuxcontainers Incus

CVE-2026-33743

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.

Published 2026-03-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.004 (36.1th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 36th percentile — 36.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.001

Affected products

Linuxcontainers Incus
Lxc Incus — versions < 6.23.0

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

References

github.com/lxc/incus/security/advisories/GHSA-vg76-xmhg-j5x3 (Exploit, Vendor Advisory)

Frequently asked questions

What is CVE-2026-33743?: CVE-2026-33743 is a medium-severity vulnerability in Linuxcontainers Incus, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 6.5/10. Published 2026-03-26.
How severe is CVE-2026-33743?: Medium severity. CVSS v3 base score is 6.5 out of 10.