How severe is CVE-2026-33542?

CVE-2026-33542 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-33542 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-33542?

CVE-2026-33542 affects Linuxcontainers Incus. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-33542?

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

Does CVE-2026-33542 have an EU (EUVD) identifier?

Yes. CVE-2026-33542 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-16460.

When was CVE-2026-33542 published?

CVE-2026-33542 was published on 2026-03-26 and last updated on 2026-06-17.

CVE-2026-33542

CVE-2026-33542 is a medium-severity vulnerability in Linuxcontainers Incus with a CVSS 3.x base score of 4.8. 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-295.

Key facts

Severity: Medium (CVSS 3.x base score 4.8)
CVSS v4: 5.7
EPSS exploit prediction: 0% (8th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-16460
Weakness: CWE-295
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 lack of validation of the image fingerprint when downloading from simplestreams image servers opens the door to image cache poisoning and under very narrow circumstances exposes other tenants to running attacker controlled images rather than the expected one. Version 6.23.0 patches the issue.

Frequently asked questions

What is CVE-2026-33542?: Incus is a system container and virtual machine manager. Prior to version 6.23.0, a lack of validation of the image fingerprint when downloading from simplestreams image servers opens the door to image cache poisoning and under very narrow circumstances exposes other tenants to running attacker controlled images rather than the expected one. Version 6.23.0 patches the issue.
How severe is CVE-2026-33542?: CVE-2026-33542 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-33542 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-33542?: CVE-2026-33542 affects Linuxcontainers Incus. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-33542?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-33542 have an EU (EUVD) identifier?: Yes. CVE-2026-33542 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-16460.
When was CVE-2026-33542 published?: CVE-2026-33542 was published on 2026-03-26 and last updated on 2026-06-17.

References

https://github.com/lxc/incus/security/advisories/GHSA-p8mm-23gg-jc9r

Affected products (1)

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

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