How severe is CVE-2026-33743?

CVE-2026-33743 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-33743 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-33743?

CVE-2026-33743 affects Linuxcontainers Incus. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-33743?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-33743 have an EU (EUVD) identifier?

Yes. CVE-2026-33743 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-16464.

When was CVE-2026-33743 published?

CVE-2026-33743 was published on 2026-03-26 and last updated on 2026-06-17.

CVE-2026-33743

CVE-2026-33743 is a medium-severity vulnerability in Linuxcontainers Incus with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-770.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 0% (31st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-16464
Weakness: CWE-770
Affected product: Linuxcontainers Incus
Published: 2026-03-26
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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.
How severe is CVE-2026-33743?: CVE-2026-33743 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-33743 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-33743?: CVE-2026-33743 affects Linuxcontainers Incus. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-33743?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-33743 have an EU (EUVD) identifier?: Yes. CVE-2026-33743 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-16464.
When was CVE-2026-33743 published?: CVE-2026-33743 was published on 2026-03-26 and last updated on 2026-06-17.

References

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

Affected products (1)

cpe:2.3:a:linuxcontainers:incus:*:*:*:*:*:*:*:*

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